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A107280
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Numbers n such that 22446688 * 10^n + 1 is prime.
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0
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11, 36, 53, 54, 109, 123, 259, 380, 877, 1205, 1795, 14153, 21965
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OFFSET
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1,1
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COMMENTS
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These are almost-all-even-digits primes and they have all been certified. No more terms up to 25000. Primality proof for the largest: PFGW Version 20041001.Win_Stable (v1.2 RC1b) [FFT v23.8] Primality testing 22446688*10^21965+1 [N-1, Brillhart-Lehmer-Selfridge] Running N-1 test using base 3 22446688*10^21965+1 is prime! (70.7023s+0.0215s)
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LINKS
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PROG
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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