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-rw-r--r--games/primes/primes.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/games/primes/primes.h b/games/primes/primes.h
index 7dcef52..3a18fc7 100644
--- a/games/primes/primes.h
+++ b/games/primes/primes.h
@@ -41,8 +41,10 @@
* chongo <for a good prime call: 391581 * 2^216193 - 1> /\oo/\
*/
+#include <stdint.h>
+
/* ubig is the type that holds a large unsigned value */
-typedef unsigned long ubig; /* must be >=32 bit unsigned value */
+typedef uint64_t ubig; /* must be >=32 bit unsigned value */
#define BIG ULONG_MAX /* largest value will sieve */
/* bytes in sieve table (must be > 3*5*7*11) */
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