12-27-2024, 04:23 PM
i think i have shown this off before, but i have to find the topic. i computed primes beginning with 18 trilliard.
it was somewhat slow on my laptop computer with 2-core cpu and 4gb ram.
i used a routine like that to try to come up with a 19-digit palindromic prime. so far i have been unsuccessful finding one.
could do that ancient greek guy's sieve with a _bit array that represents only the odd numbers beginning with 3. sadly it cannot reach anywhere near the positive signed _integer64 limit, would need 64gb ram or much more but it did speed up calculations a bit of really large integers.
it was somewhat slow on my laptop computer with 2-core cpu and 4gb ram.
i used a routine like that to try to come up with a 19-digit palindromic prime. so far i have been unsuccessful finding one.
could do that ancient greek guy's sieve with a _bit array that represents only the odd numbers beginning with 3. sadly it cannot reach anywhere near the positive signed _integer64 limit, would need 64gb ram or much more but it did speed up calculations a bit of really large integers.