2+(odd)

2^1139+1

Open composite · C248

NFS Planning

GNFS Murphy estimate: 9.22e-18
SNFS Murphy raw: 1.56e-16
SNFS Murphy normalized (deg 6): 9.78e-17
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.53212

Identifiers

Target expression: 2^1139+1
Target link: FactorDB page
Target ID: 1000000000012151163
Target changed: Before 6/8/2026
Parent query: Same as target
Parent ID: -
Cofactor token: C248
Imported: Jun 07, 2026, 01:41 AM UTC

Raw pmain126 Factorization

(1,17,67) 195090954822051707.67287821449693070372895357014126417403959115084746851.C248

SNFS Polynomial

Polynomial

Degree: 7
Raw Murphy: 1.56e-16
Normalized (deg 6): 9.78e-17
Skew: 1.53212
Selected: Best

n: 88224613611244796004086272551525335462986324791925981909755299486466240378603479579852297412860232533343972126008810570034966353580232447284351133516355269919980492366595203277760205452083830883738582107160724431862615269225360878456510890869679443
# 2^1139+1, difficulty: 343.48, skewness: 1.22
# cost: 5.34025e+21, est. time: 2542974.13 GHz days (not accurate yet!)
# Optimized skew: 1.53212 Murphy: 1.56e-16
skew: 1.53212
c7: 1
c0: 4
Y1: -1
Y0: 11692013098647223345629478661730264157247460343808
type: snfs