(0) I cracked this wonderful hex file editor only to demonstrate that it is possible to break RSA264 and nothing will stop the mighty CORE crackers.
(1) HIEW is the best hex file editor around the world. It does much help to cracking. It deserves $64. If you really like it, buy it.
(2) There won't be *ANY* update keygens for future HIEW versions. And I must apologize to HIEW's author.
(3) RSA264 took me 15 hours to factorize the public key (RSA_D) in a Celeron 300A (o/c to 473MHz) with 128MB RAM. I think the author chose a very good prime pair.