Has it been confirmed that these are valid prime chains? If I'm not mistaken (please correct me if I am), primecoin only checks for probable primality.
I used
Primeform to test these primes - results below
15746436948707162347681191092622506406480521554672382866529113365451686336191616303820985251295842020684640523576306336183730859560 - Evaluator failed
65004063504559525007738276505391185322137155270201199057971076511954045665048965173722209501026611156768988779138868408914387452650147975793533060274322762630 is composite: [27F4F267A7BEF21D] (0.0014s+0.0004s)