2^1229-1

Open composite · C284

NFS Planning

GNFS Murphy estimate: 7.53e-20
SNFS Murphy score: 2.00e-17
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.70152

Identifiers

Target expression: 2^1229-1
Target link: FactorDB page
Target ID: 1000000000000001229
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C284
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

36871.46703.10543179280661916121033.9536289355314392579996071515160583098298616686033085857.C284

SNFS Polynomial

Polynomial

Degree: 7
Murphy: 2.00e-17
Skew: 1.70152
Selected: Best

n: 53392955842462906502525256206896237530607657681405452248628829538140335056019091833139309039691476989536595672486245741799613486059460767317912672601233477410458189253022780891585730123223883909898404934891596729489833819787859139386557550548823481244976333432522178629028656984007087
# 2^1229-1, difficulty: 370.87, skewness: 1.35
# cost: 2.89086e+22, est. time: 13765999.90 GHz days (not accurate yet!)
# Optimized skew: 1.70152 Murphy: 2.00e-17
skew: 1.70152
c7: 1
c0: -8
Y1: -1
Y0: 95780971304118053647396689196894323976171195136475136
type: snfs