

A268660


Numbers n such that 3*2^n + 1 is a prime factor of a generalized Fermat number 12^(2^m) + 1 for some m.


10



2, 5, 8, 41, 209, 353, 2816, 20909, 42665, 157169, 213321, 303093, 362765, 382449, 2145353, 2478785
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OFFSET

1,1


REFERENCES

Wilfrid Keller, private communication, 2008.


LINKS



CROSSREFS



KEYWORD

nonn,hard,more


AUTHOR



STATUS

approved



