fix rho

1 files changed, 2 insertions, 2 deletions

diff --git a/math/rho.cpp b/math/rho.cpp
index 635c630..7885196 100644
--- a/math/rho.cpp
+++ b/math/rho.cpp
@@ -1,8 +1,8 @@
 using lll = __int128;
 ll rho(ll n) { // Findet Faktor < n, nicht unbedingt prim.
 	if (n % 2 == 0) return 2;
-	ll x = 0, y = 0, prd = 2;
-	auto f = [n](lll x){return (x * x) % n + 1;};
+	ll x = 0, y = 0, prd = 2, i = n/2 + 7;
+	auto f = [&](lll x){return (x * x + i) % n;};
 	for (ll t = 30, i = n/2 + 7; t % 40 || gcd(prd, n) == 1; t++) {
 		if (x == y) x = ++i, y = f(x);
 		if (ll q = (lll)prd * abs(x-y) % n; q) prd = q;