perl bin/algorithm3.pl 4_294_967_296 --sum Sum of primes : 425649736193687430 Compute time : 1.222 sec perl bin/primesieve.pl 4_294_967_296 --sum Sum of primes : 425649736193687430 Compute time : 0.431 sec perl bin/primeutil.pl 4_294_967_296 --sum Sum of primes : 425649736193687430 Compute time : 0.873 sec perl -Mntheory=:all -E 'say sum_primes(2**32)' 425649736193687430 4.627s user time perl -Mntheory=:all -E 'my $s=0; forprimes { $s+=$_ } 2**32; say $s' 425649736193687430 11.198s user time