2+(odd)

2^1301+1

Open composite · C276

NFS Planning

GNFS Murphy estimate: 2.19e-19
SNFS Murphy score: 4.11e-18
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.40222

Identifiers

Target expression: 2^1301+1
Target link: FactorDB page
Target ID: 1000000000012151325
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C276
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

(1) 18216252210539.15826129842694553.871261283739006918793648516169148264947.158538524646017900250810607995506380920082613411.C276

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 4.11e-18
Skew: 1.40222
Selected: Best

n: 365414789754819982158210596281013021118589682345581795815036208453747373788756692217811101714541353406711202085535677867616714113274906515179458916809060653406038131205625347743501625492703998860580903434516224912245347056252279435485182258862547628738090981464273319091010609
# 2^1301+1, difficulty: 391.94, skewness: 1.10
# cost: 1.00767e+23, est. time: 47984298.06 GHz days (not accurate yet!)
# Optimized skew: 1.40222 Murphy: 4.11e-18
skew: 1.40222
c7: 1
c0: 2
Y1: -1
Y0: 98079714615416886934934209737619787751599303819750539264
type: snfs