/* Hello-world program for PARI/GP, based on Thomas Baruchel’s Python:
   <https://stackoverflow.com/a/33594481> and on typing at my shell
   prompt gp2c <<<'nextprime(351)' */

#include <stdio.h>
#include <stdlib.h>
#include <pari/pari.h>

int main(int argc, char **argv)
{
  long n = argv[1] ? atol(argv[1]) : 33;
  pari_init(1<<16, 0); /* Without this it segfaults; 1<<19 more reasonable */
  printf("next prime after %ld is %ld\n", n, itos(nextprime(stoi(n))));
  return 0;
}