diff --git a/main.c b/main.c
index 205e45c..29770df 100644
--- a/main.c
+++ b/main.c
@@ -33,10 +33,15 @@ int main() {
 
     enter_blink();
 
+#ifdef RANDOM
     uint64_t p = gen_prime(1 << 15, 1 << 16);
     uint64_t q = p;
 
     while (p == q) p = gen_prime(1 << 15, 1 << 16);
+#else
+    uint64_t p = 56857;
+    uint64_t q = 47963;
+#endif
 
     uint64_t n = p * q;
     uint64_t phi_n = (p - 1) * (q - 1);