2+(4k)

2^1348+1

Open composite · C383

NFS Planning

GNFS Murphy estimate: 1.36e-25
SNFS Murphy score: 1.28e-18
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.71390

Identifiers

Target expression: 2^1348+1
Target link: FactorDB page
Target ID: 1000000000012151372
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C383
Imported: Jun 03, 2026, 04:30 PM UTC

Raw pmain126 Factorization

(4) 847962097.5114319759089. C383

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 1.28e-18
Skew: 1.71390
Selected: Best

n: 83333748162565549762084657786282104523786379662376114535391198221810845488464244304556158037381389329533701210879158542151009297881876675667241185287484524892099829012327365464210312015930540578599358799180784112068413154309456191394504303620905589404905034404815327839033118156614495546951308154550634157592935496968463844607437544189463197313771643552839896742887390358161427659537
# 2^1348+1, difficulty: 406.69, skewness: 1.35
# cost: 2.35805e+23, est. time: 112288047.49 GHz days (not accurate yet!)
# Optimized skew: 1.71390 Murphy: 1.28e-18
skew: 1.71390
c7: 1
c0: 8
Y1: -1
Y0: 12554203470773361527671578846415332832204710888928069025792
type: snfs