Hello, This follows from a prior discussion thread http://mail.openjdk.java.net/pipermail/core-libs-dev/2014-May/026771.html.
Issue: https://bugs.openjdk.java.net/browse/JDK-8042478 Patch: http://cr.openjdk.java.net/~bpb/8042478/webrev.00/ Adds a test of the first 19 Mersenne primes. The remainder of the exponent list is commented out as it takes too long to run. The value 19 appears to give a reasonable execution time. The largest Mersenne prime tested is 285542542228902608580607. Thanks, Brian
