C:\>perl -MMath::BigInt -le "push @ans, 6**25; push @ans, Math::BigInt->new(6)**25; push @ans, 6**Math::BigInt->new(25); push @ans, Math::BigInt->new(6)**Math::BigInt->new(25); print for @ans"
2.84302880299297e+019
28430288029929701376
28430288029929701376
28430288029929701376