5^557+1

Open composite · C377

NFS Planning

GNFS Murphy estimate: 3.04e-25
SNFS Murphy score: 3.66e-18
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 2.52864

Identifiers

Target expression: 5^557+1
Target link: FactorDB page
Target ID: 1000000000016637355
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C377
Imported: Jun 03, 2026, 04:31 PM UTC

Raw pmain126 Factorization

(1) 47903.62974421. C377

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 3.66e-18
Skew: 2.52864
Selected: Best

n: 11711547089622411406690930961499401329209601900258367926100210697711518384763783301203649511359057293449572800834958746760722060737741917371340803866108597615138610352566523409505303488861029097751559205781804086225977289267923078222661849918950857099170635855137342918466196955991349777789843010040534698573727880380772602244117588727133833124502812551359491775023245801788267
# 5^557+1, difficulty: 391.42, skewness: 1.99
# cost: 9.77698e+22, est. time: 46557046.52 GHz days (not accurate yet!)
# Optimized skew: 2.52864 Murphy: 3.66e-18
skew: 2.52864
c7: 1
c0: 125
Y1: -1
Y0: 82718061255302767487140869206996285356581211090087890625
type: snfs