2+(odd)

2^1139+1

Open composite · C248

NFS Planning

GNFS Murphy estimate: 9.22e-18
SNFS Murphy score: 2.24e-16
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 8
SNFS skew: 1.25611

Identifiers

Target expression: 2^1139+1
Target link: FactorDB page
Target ID: 1000000000012151163
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C248
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

(1,17,67) 195090954822051707.67287821449693070372895357014126417403959115084746851.C248

SNFS Polynomial

Polynomial

Degree: 8
Murphy: 2.24e-16
Skew: 1.25611
Selected: Best

n: 88224613611244796004086272551525335462986324791925981909755299486466240378603479579852297412860232533343972126008810570034966353580232447284351133516355269919980492366595203277760205452083830883738582107160724431862615269225360878456510890869679443
# 2^1139+1, difficulty: 322.70, skewness: 1.00
# cost: 1.40482e+21, est. time: 668961.93 GHz days (not accurate yet!)
# Optimized skew: 1.25611 Murphy: 2.24e-16
skew: 1.25611
c8: 1
c7: -1
c6: -7
c5: 6
c4: 15
c3: -10
c2: -10
c1: 4
c0: 1
Y1: -147573952589676412928
Y0: 21778071482940061661655974875633165533185
type: snfs