2+(odd)

2^1271+1

Open composite · C314

NFS Planning

GNFS Murphy estimate: 1.37e-21
SNFS Murphy score: 7.64e-18
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.70599

Identifiers

Target expression: 2^1271+1
Target link: FactorDB page
Target ID: 1000000000012151295
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C314
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

(1,31,41) 411057250299010549488282116052932379073775618969. C314

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 7.64e-18
Skew: 1.70599
Selected: Best

n: 62832413620614543010103229150018351758268307857606854741988937097919115068351917216743157247805238013227864509178767266742351067499431415785838261552669555017371204331910501100395364492427614810882785249153216086380275077053567343007023186549550060605498683473331066913096460054800422468949234989802449813569309179
# 2^1271+1, difficulty: 383.51, skewness: 1.35
# cost: 6.14554e+22, est. time: 29264470.31 GHz days (not accurate yet!)
# Optimized skew: 1.70599 Murphy: 7.64e-18
skew: 1.70599
c7: 1
c0: 8
Y1: -1
Y0: 6129982163463555433433388108601236734474956488734408704
type: snfs