OFFSET
1,1
COMMENTS
All numbers in this sequence end in either 5 or 1.
LINKS
Shyam Sunder Gupta, Table of n, a(n) for n = 1..831
EXAMPLE
645 is a pseudoprime (base 2) and 641, 643 and 647 are primes.
CROSSREFS
KEYWORD
nonn
AUTHOR
Shyam Sunder Gupta, Oct 27 2013
STATUS
approved