[genius] update mersenne to latest from gimps

[George Lebl <jirka src gnome org>]

commit d641a126a8ac0b29c39d8530cd5e727175e92621
Author: Jiri (George) Lebl <jirka 5z com>
Date:   Sat Dec 15 13:13:57 2012 -0600

    update mersenne to latest from gimps

 lib/number_theory/primes.gel |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/lib/number_theory/primes.gel b/lib/number_theory/primes.gel
index e49568e..cfca4d4 100644
--- a/lib/number_theory/primes.gel
+++ b/lib/number_theory/primes.gel
@@ -120,10 +120,10 @@ function IsMersennePrimeExponent(p) = (
 		return true;
 
 	# http://www.mersenne.org / GIMPS doublechecked everything up
-	# to 24,212,801 (on Jun. 23, 2012)
-	if p <= 24212801 then
+	# to 25,921,121 (on Dec. 15, 2012)
+	if p <= 25921121 then
 		return false;
 
-	error("IsMersennePrimeExponent: Number too large (known values up to: " + 24212801 + ")");
+	error("IsMersennePrimeExponent: Number too large (known values up to: " + 25921121 + ")");
 	bailout
 );