Generator Point G multiple if in a curve y2 mod p = x3+ 7 mod p ( ecdsa-secp256k1)

p=115792089237316195423570985008687907853269984665640564039457584007908834671663

G=55066263022277343669578718895168534326250603453777594175500187360389116729240,32670510020758816978083085130507043184471273380659243275938904335757337482424

nG=21505829891763648114329055987619236494102133314575206970830385799158076338148,98003708678762621233683240503080860129026887322874138805529884920309963580118

2nG=72488970228380509287422715226575535698893157273063074627791787432852706183111,62070622898698443831883535403436258712770888294397026493185421712108624767191

How do i find 'n' ?
You can find n by consulting a discrete log oracle, such as myself. N is 5. You're welcome.