> %N A036570 Primes p such that (p+1)/2 and (p+2)/3 are also prime. > %C A147615 Are there infinitely many terms in the intersection of this > sequence and A036570? No: after the ninth term, all A147615 values are multiples of 13. (BTW, A036570 should ref A074200, A093553.) -- Don Reble djr at nk.ca