9 lines
180 B
Text
9 lines
180 B
Text
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var limit = 1000
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say "Repunit prime digits (up to #{limit}) in:"
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for n in (2..20) {
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printf("Base %2d: %s\n", n,
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{|k| is_prime((n**k - 1) / (n-1)) }.grep(1..limit))
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}
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