3^751-1

Open composite · C321

NFS Planning

GNFS Murphy estimate: 5.38e-22
SNFS Murphy score: 4.96e-17
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.08572

Identifiers

Target expression: 3^751-1
Target link: FactorDB page
Target ID: 1000000000018246519
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C321
Imported: Jun 03, 2026, 04:30 PM UTC

Raw pmain126 Factorization

(1) 3343453.166253377.178550628538635458028047. C321

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 4.96e-17
Skew: 1.08572
Selected: Best

n: 104786471688048742066105978247515239373296471988403559313359837276256873465456333467594288344353735953393731394067849782100295503102020555376248962327709291945006617501757673976786632647676783244523463725870075553672972219365953051815534865860361711963672171300559806256221744405449820118051994030282129881480306546784439
# 3^751-1, difficulty: 358.32, skewness: 1.37
# cost: 1.34639e+22, est. time: 6411394.78 GHz days (not accurate yet!)
# Optimized skew: 1.08572 Murphy: 4.96e-17
skew: 1.08572
c7: 1
c0: -9
Y1: -1127130637840908780976740490797413723399509150616187
Y0: 1
type: snfs