Additive primes: Difference between revisions
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def prime?(n) # P3 Prime Generator primality test |
def prime?(n) # P3 Prime Generator primality test |
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return false unless n |
return false unless (n | 1 == 3 if n < 5) || (n % 6) | 4 == 5 |
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sqrt_n = Math.isqrt(n) # For Crystal < 1.2.0 use Math.sqrt(n).to_i |
sqrt_n = Math.isqrt(n) # For Crystal < 1.2.0 use Math.sqrt(n).to_i |
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pc = typeof(n).new(5) |
pc = typeof(n).new(5) |
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