Primes of form x^y+y^x where x and y are composite numbers.
2 seqfan posts
Tue Mar 23 04:14:45 CET 2010 [seqfan] Re: Fixing A173907
Tue Mar 23 03:24:07 CET 2010 [seqfan] Fixing A173907
Index of A-numbers in seqfan: by ascending order
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