7^917+1

Open composite · C269

NFS Planning

GNFS Murphy estimate: 5.58e-19
SNFS Murphy score: 1.51e-16
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 6
SNFS skew: 0.49848

Identifiers

Target expression: 7^917+1
Target link: FactorDB page
Target ID: 1000000000016831515
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C269
Imported: Jun 03, 2026, 04:31 PM UTC

Raw pmain126 Factorization

(1,131) L.M L (7L) 283600591.13687656240763.90522517105381248254039.4475146393954470814007626381.426813419207563587890999014804808249714827.C217 M (7M) 5079066764495290200666390635362115452411866362731756307723431.P269

SNFS Polynomial

Polynomial

Degree: 6
Murphy: 1.51e-16
Skew: 0.49848
Selected: Best

n: 28722843171078747825096682977975375612095822289808362354529233749698622189339904687378984040188807042430673764440140041067843407238484798140015655061696636563272277861792280926122819227405603957197881167421509484324305303886313742466146533544042927635077752261601230801
# 7^917+1 Aurifeuillian M, difficulty: 332.12, skewness: 0.38
# cost: 2.59008e+21, est. time: 1233373.19 GHz days (not accurate yet!)
# Optimized skew: 0.49848 Murphy: 1.51e-16
skew: 0.49848
c6: 343
c5: 343
c4: 147
c3: 49
c2: 21
c1: 7
c0: 1
Y1: -1
Y0: 8538323413450849900970017037940802745289307058918668807
type: snfs