diff --git a/main.c b/main.c
index 29770df..ad65852 100644
--- a/main.c
+++ b/main.c
@@ -5,6 +5,7 @@
 #include <stdio.h>
 
 #define LED_PIN PD6
+#define RSA_16
 
 void exit_blink() {
     for (int i = 0; i < 4; i++) {
@@ -26,28 +27,24 @@ void enter_blink() {
 
 int main() {
     SystemInit();
-    sprand(0);
+
+    printf("Entering...\n");
 
     funGpioInitAll();
     funPinMode(LED_PIN, GPIO_Speed_10MHz | GPIO_CNF_OUT_PP);
 
     enter_blink();
 
-#ifdef RANDOM
     uint64_t p = gen_prime(1 << 15, 1 << 16);
-    uint64_t q = p;
+    uint64_t q = gen_prime(1 << 15, 1 << 16);
 
     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);
 
     // 'e' is public. E for encrypt.
-    uint64_t e = 0;
+    uint64_t e = prand_range(3, phi_n - 1);
     while (gcd(e, phi_n) != 1) e = prand_range(3, phi_n - 1);
 
     // 'd' is our private key. D as in decrypt