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A230488
Pseudoprimes n to base 2 such that n-2 and n-4 are primes.
4
645, 33153, 129921, 157641, 451905, 656601, 1608465, 3020361, 3370641, 6212361, 19092921, 34487601, 38790753, 681942801, 940492785, 1109260545, 1574300001, 2693081973, 3037396461, 4160578521, 6424683105, 7384487181, 13671360561, 14966031345, 15731001105
OFFSET
1,1
LINKS
EXAMPLE
645 is a pseudoprime (base 2) and 643 and 641 are primes.
CROSSREFS
Sequence in context: A265684 A067845 A057942 * A228575 A250989 A187434
KEYWORD
nonn
AUTHOR
Shyam Sunder Gupta, Oct 20 2013
STATUS
approved