Cullen and Woodall numbers: Difference between revisions
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1 7 23 63 159 383 895 2047 4607 10239 22527 49151 106495 229375 491519 1048575 2228223 4718591 9961471 20971519 |
1 7 23 63 159 383 895 2047 4607 10239 22527 49151 106495 229375 491519 1048575 2228223 4718591 9961471 20971519 |
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</pre> |
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=={{header|Sidef}}== |
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<lang ruby>func cullen(n) { n * (1 << n) + 1 } |
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func woodall(n) { n * (1 << n) - 1 } |
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say "First 20 Cullen numbers:" |
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say cullen.map(1..20).join(' ') |
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say "\nFirst 20 Woodall numbers:" |
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say woodall.map(1..20).join(' ') |
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say "\nFirst 5 Cullen primes: (in terms of n)" |
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say 5.by { cullen(_).is_prime }.join(' ') |
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say "\nFirst 12 Woodall primes: (in terms of n)" |
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say 12.by { woodall(_).is_prime }.join(' ')</lang> |
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{{out}} |
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<pre> |
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First 20 Cullen numbers: |
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3 9 25 65 161 385 897 2049 4609 10241 22529 49153 106497 229377 491521 1048577 2228225 4718593 9961473 20971521 |
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First 20 Woodall numbers: |
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1 7 23 63 159 383 895 2047 4607 10239 22527 49151 106495 229375 491519 1048575 2228223 4718591 9961471 20971519 |
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First 5 Cullen primes: (in terms of n) |
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1 141 4713 5795 6611 |
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First 12 Woodall primes: (in terms of n) |
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2 3 6 30 75 81 115 123 249 362 384 462 |
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</pre> |
</pre> |
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