1 // This program prints the largest now known even perfect number.
3 #include <cln/integer.h>
4 #include <cln/integer_io.h>
11 // previous ones were 1257787, 1398269, 2976221, 3021377, 6972593, 13466917, 20996011
13 cl_I x = (((cl_I)1 << p) - 1) << (p-1);