

A171612


Integers n such that (25*10^n)+1 is prime.


0



1, 8, 255, 320, 609, 688, 1436, 3271, 3921, 6520, 19604, 38348, 63531
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OFFSET

1,2


COMMENTS

No others less than 20000.
See Kamada link  primecount.txt for terms, primesize.txt for discovery details including probable or proved primes  search on "25001".


LINKS



EXAMPLE

For n=8 we have (25*10^8)+1 = 25*100000000+1 = 2500000000+1 = 2500000001, which is prime.


CROSSREFS



KEYWORD

more,nonn


AUTHOR

Julien Peter Benney (jpbenney(AT)ftml.net), Dec 13 2009


EXTENSIONS

a(12)a(13) from Kamada data by Tyler Busby, May 03 2024


STATUS

approved



