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Given a number $n \geq 3$ as input output the smallest number $k$ such that the modular residues of $k$ by the first $n$ primes is exactly $\{-1,0,1\}$. That is there is a prime in the first $n$ p...
#3: Post edited
Given a number $n \geq 3$ as input output the smallest number $k$ of modular residues of $k$ by the first $n$ primes is exactly $\{-1,0,1\}$.- That is there is a prime in the first $n$ primes that divides $k$, one that divides $k+1$ and one that divides $k-1$, *and* every prime in the first $n$ primes divides one of those three values.
- For example if $n=5$, the first $5$ primes are $2, 3, 5, 7, 11$ the value must be at least $10$ since with anything smaller $11$ is an issue. So we start with $10$:
- $$
- 10 \equiv 0 \mod 2
- $$
- $$
- 10 \equiv 1 \mod 3
- $$
- $$
- 10 \equiv 0 \mod 5
- $$
- $$
- 10 \equiv 3 \mod 7
- $$
- Since $10 \mod 7 \equiv 3$, $10$ is not a solution so we try the next number.
- * $11 \equiv 4\mod 7$ so we try the next number.
- * $12 \equiv 2\mod 5$, so we try the next number.
- * $13 \equiv 3\mod 5$, so we try the next number.
- * $14 \equiv 3\mod 11$, so we try the next number.
- * $15 \equiv 4\mod 11$, so we try the next number.
- * $16 \equiv 2\mod 7$, so we try the next number.
- * $17 \equiv 2\mod 5$, so we try the next number.
- * $18 \equiv 3\mod 5$, so we try the next number.
- * $19 \equiv 5\mod 7$, so we try the next number.
- * $20 \equiv 9\mod 11$, so we try the next number.
- $$
- 21 \equiv 1 \mod 2
- $$
- $$
- 21 \equiv 0 \mod 3
- $$
- $$
- 21 \equiv 1 \mod 5
- $$
- $$
- 21 \equiv 0 \mod 7
- $$
- $$
- 21 \equiv -1 \mod 11
- $$
- 21 satisfies the property so its the answer.
- ## Task
- Take as input $n \geq 3$ and give as output the smallest number satisfying.
- This is code-golf. The goal is to minimize the size of your source code as measured in bytes
- ## Test cases
- ```
- 3 -> 4
- 4 -> 6
- 5 -> 21
- 6 -> 155
- 7 -> 441
- ```
- Given a number $n \geq 3$ as input output the smallest number $k$ such that the modular residues of $k$ by the first $n$ primes is exactly $\{-1,0,1\}$.
- That is there is a prime in the first $n$ primes that divides $k$, one that divides $k+1$ and one that divides $k-1$, *and* every prime in the first $n$ primes divides one of those three values.
- For example if $n=5$, the first $5$ primes are $2, 3, 5, 7, 11$ the value must be at least $10$ since with anything smaller $11$ is an issue. So we start with $10$:
- $$
- 10 \equiv 0 \mod 2
- $$
- $$
- 10 \equiv 1 \mod 3
- $$
- $$
- 10 \equiv 0 \mod 5
- $$
- $$
- 10 \equiv 3 \mod 7
- $$
- Since $10 \mod 7 \equiv 3$, $10$ is not a solution so we try the next number.
- * $11 \equiv 4\mod 7$ so we try the next number.
- * $12 \equiv 2\mod 5$, so we try the next number.
- * $13 \equiv 3\mod 5$, so we try the next number.
- * $14 \equiv 3\mod 11$, so we try the next number.
- * $15 \equiv 4\mod 11$, so we try the next number.
- * $16 \equiv 2\mod 7$, so we try the next number.
- * $17 \equiv 2\mod 5$, so we try the next number.
- * $18 \equiv 3\mod 5$, so we try the next number.
- * $19 \equiv 5\mod 7$, so we try the next number.
- * $20 \equiv 9\mod 11$, so we try the next number.
- $$
- 21 \equiv 1 \mod 2
- $$
- $$
- 21 \equiv 0 \mod 3
- $$
- $$
- 21 \equiv 1 \mod 5
- $$
- $$
- 21 \equiv 0 \mod 7
- $$
- $$
- 21 \equiv -1 \mod 11
- $$
- 21 satisfies the property so its the answer.
- ## Task
- Take as input $n \geq 3$ and give as output the smallest number satisfying.
- This is code-golf. The goal is to minimize the size of your source code as measured in bytes
- ## Test cases
- ```
- 3 -> 4
- 4 -> 6
- 5 -> 21
- 6 -> 155
- 7 -> 441
- ```
#2: Post edited
Find near miss prime multiples.
- Given a number $n \geq 3$ as input output the smallest number $k$ of modular residues of $k$ by the first $n$ primes is exactly $\{-1,0,1\}$.
- That is there is a prime in the first $n$ primes that divides $k$, one that divides $k+1$ and one that divides $k-1$, *and* every prime in the first $n$ primes divides one of those three values.
For example if $n=5$, the first $3$ primes are $2, 3, 5, 7, 11$ the value must be at least $10$ since with anything smaller $11$ is an issue. So we start with $10$:- $$
- 10 \equiv 0 \mod 2
- $$
- $$
- 10 \equiv 1 \mod 3
- $$
- $$
- 10 \equiv 0 \mod 5
- $$
- $$
- 10 \equiv 3 \mod 7
- $$
- Since $10 \mod 7 \equiv 3$, $10$ is not a solution so we try the next number.
- * $11 \equiv 4\mod 7$ so we try the next number.
- * $12 \equiv 2\mod 5$, so we try the next number.
- * $13 \equiv 3\mod 5$, so we try the next number.
- * $14 \equiv 3\mod 11$, so we try the next number.
- * $15 \equiv 4\mod 11$, so we try the next number.
- * $16 \equiv 2\mod 7$, so we try the next number.
- * $17 \equiv 2\mod 5$, so we try the next number.
- * $18 \equiv 3\mod 5$, so we try the next number.
- * $19 \equiv 5\mod 7$, so we try the next number.
- * $20 \equiv 9\mod 11$, so we try the next number.
- $$
- 21 \equiv 1 \mod 2
- $$
- $$
- 21 \equiv 0 \mod 3
- $$
- $$
- 21 \equiv 1 \mod 5
- $$
- $$
- 21 \equiv 0 \mod 7
- $$
- $$
- 21 \equiv -1 \mod 11
- $$
- 21 satisfies the property so its the answer.
- ## Task
- Take as input $n \geq 3$ and give as output the smallest number satisfying.
- This is code-golf. The goal is to minimize the size of your source code as measured in bytes
- ## Test cases
- ```
- 3 -> 4
- 4 -> 6
- 5 -> 21
- 6 -> 155
- 7 -> 441
- ```
- Given a number $n \geq 3$ as input output the smallest number $k$ of modular residues of $k$ by the first $n$ primes is exactly $\{-1,0,1\}$.
- That is there is a prime in the first $n$ primes that divides $k$, one that divides $k+1$ and one that divides $k-1$, *and* every prime in the first $n$ primes divides one of those three values.
- For example if $n=5$, the first $5$ primes are $2, 3, 5, 7, 11$ the value must be at least $10$ since with anything smaller $11$ is an issue. So we start with $10$:
- $$
- 10 \equiv 0 \mod 2
- $$
- $$
- 10 \equiv 1 \mod 3
- $$
- $$
- 10 \equiv 0 \mod 5
- $$
- $$
- 10 \equiv 3 \mod 7
- $$
- Since $10 \mod 7 \equiv 3$, $10$ is not a solution so we try the next number.
- * $11 \equiv 4\mod 7$ so we try the next number.
- * $12 \equiv 2\mod 5$, so we try the next number.
- * $13 \equiv 3\mod 5$, so we try the next number.
- * $14 \equiv 3\mod 11$, so we try the next number.
- * $15 \equiv 4\mod 11$, so we try the next number.
- * $16 \equiv 2\mod 7$, so we try the next number.
- * $17 \equiv 2\mod 5$, so we try the next number.
- * $18 \equiv 3\mod 5$, so we try the next number.
- * $19 \equiv 5\mod 7$, so we try the next number.
- * $20 \equiv 9\mod 11$, so we try the next number.
- $$
- 21 \equiv 1 \mod 2
- $$
- $$
- 21 \equiv 0 \mod 3
- $$
- $$
- 21 \equiv 1 \mod 5
- $$
- $$
- 21 \equiv 0 \mod 7
- $$
- $$
- 21 \equiv -1 \mod 11
- $$
- 21 satisfies the property so its the answer.
- ## Task
- Take as input $n \geq 3$ and give as output the smallest number satisfying.
- This is code-golf. The goal is to minimize the size of your source code as measured in bytes
- ## Test cases
- ```
- 3 -> 4
- 4 -> 6
- 5 -> 21
- 6 -> 155
- 7 -> 441
- ```
#1: Initial revision
Find near miss prime multiples.
Given a number $n \geq 3$ as input output the smallest number $k$ of modular residues of $k$ by the first $n$ primes is exactly $\{-1,0,1\}$. That is there is a prime in the first $n$ primes that divides $k$, one that divides $k+1$ and one that divides $k-1$, *and* every prime in the first $n$ primes divides one of those three values. For example if $n=5$, the first $3$ primes are $2, 3, 5, 7, 11$ the value must be at least $10$ since with anything smaller $11$ is an issue. So we start with $10$: $$ 10 \equiv 0 \mod 2 $$ $$ 10 \equiv 1 \mod 3 $$ $$ 10 \equiv 0 \mod 5 $$ $$ 10 \equiv 3 \mod 7 $$ Since $10 \mod 7 \equiv 3$, $10$ is not a solution so we try the next number. * $11 \equiv 4\mod 7$ so we try the next number. * $12 \equiv 2\mod 5$, so we try the next number. * $13 \equiv 3\mod 5$, so we try the next number. * $14 \equiv 3\mod 11$, so we try the next number. * $15 \equiv 4\mod 11$, so we try the next number. * $16 \equiv 2\mod 7$, so we try the next number. * $17 \equiv 2\mod 5$, so we try the next number. * $18 \equiv 3\mod 5$, so we try the next number. * $19 \equiv 5\mod 7$, so we try the next number. * $20 \equiv 9\mod 11$, so we try the next number. $$ 21 \equiv 1 \mod 2 $$ $$ 21 \equiv 0 \mod 3 $$ $$ 21 \equiv 1 \mod 5 $$ $$ 21 \equiv 0 \mod 7 $$ $$ 21 \equiv -1 \mod 11 $$ 21 satisfies the property so its the answer. ## Task Take as input $n \geq 3$ and give as output the smallest number satisfying. This is code-golf. The goal is to minimize the size of your source code as measured in bytes ## Test cases ``` 3 -> 4 4 -> 6 5 -> 21 6 -> 155 7 -> 441 ```