2LM

2^2570+1 L

Open composite · C290 · component L

NFS Planning

GNFS Murphy estimate: 3.38e-20
SNFS Murphy score: 4.15e-16
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 8
SNFS skew: 0.78012

Identifiers

Target expression: 2^1285+1-2^643
Target value: 666107660458521541243215380951301474471376783825069107540423190425830915819095059072783324270868747829914983293073984498648548239892701754120954022763348528827144288600910102129483734378341347193769877974074586168419022491840772048339772030615569214037330185465712955357039569394505868159667191011880326729457107735491355574705195885257618756070481749647158566763622524812571464825831425
Target link: FactorDB page
Target ID: 1100000000001379436
Target changed: -
Parent query: 2^2570+1
Parent ID: -
Cofactor token: C290
Imported: Jun 03, 2026, 04:30 PM UTC

Raw pmain126 Factorization

(2,10L,514M) 31543975240498973141. C290

SNFS Polynomial

Polynomial

Degree: 8
Murphy: 4.15e-16
Skew: 0.78012
Selected: Best

n: 18236820146161178861082428954630095395695630325671790247799898611573150147040473676524665655636862241580703143597494339120840717659104008430737599743938201158608415402979134269945897929040124230076643320682480168173682912641556069263498480084828752460952085791274466717145008911413865249561
# 2^2570+1 Aurifeuillian L, difficulty: 309.46, skewness: 0.71
# cost: 5.83448e+20, est. time: 277832.17 GHz days (not accurate yet!)
# Optimized skew: 0.78012 Murphy: 4.15e-16
skew: 0.78012
c8: 16
c7: -16
c6: 8
c4: -4
c2: 2
c1: -2
c0: 1
Y1: -1
Y0: 340282366920938463463374607431768211456
type: snfs