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A088554
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Primes of the form (5^x-1)/4 or (5^x+3)/4.
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0
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2, 7, 31, 157, 3907, 19531, 2441407, 12207031, 61035157, 305175781, 9313225746154785157, 177635683940025046467781066894531
(list;
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listen;
history;
text;
internal format)
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OFFSET
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1,1
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LINKS
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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