在数学里面，RSA-200是RSA数(IF n=pq, p and q are two primes, THEN n is RSA number)中的一个，最近被成功质数分解 (F. Bahr, M. Boehm, J. Franke, and T. Kleinjung):

RSA-200 = 2799783391122132787082946763872260162107044678695542853756
000992932612840010760934567105295536085606182235191095136
578863710595448200657677509858055761357909873495014417886
3178946295187237869221823983

RSA-200 = 3532461934402770121272604978198464368671197400197625023649
303468776121253679423200058547956528088349
* 792586995447833303334708584148005968773797585736421996073
4330341455767872818152135381409304740185467

更多的请参考Wiki。