2LM

2^2654+1 L

Open composite · C277 · component L

NFS Planning

GNFS Murphy estimate: 1.92e-19
SNFS Murphy score: 1.71e-18
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 8
SNFS skew: 1.13516

Identifiers

Target expression: 2^1327+1-2^664
Target value: 2929572472099248521370752248903701710326929586813269608269849191300018275398392146977579480512045381056466763473038486251629026189534736981024082694234338794252593107572832752109724258835381224528473284647494617414019481860752816474264168407893226006300827934679951496178955537017039457110618498772254769865910620499153916395104596863637669709746929871808697884716347441137805287763593639581410394113
Target link: FactorDB page
Target ID: 1100000000000765924
Target changed: -
Parent query: 2^2654+1
Parent ID: -
Cofactor token: C277
Imported: Jun 03, 2026, 04:30 PM UTC

Raw pmain126 Factorization

100853.2011733.844828281031420753.520196552023689611079032312673055654637.6487848713728446825916653909723849312415356018074475449.C277

SNFS Polynomial

Polynomial

Degree: 8
Murphy: 1.71e-18
Skew: 1.13516
Selected: Best

n: 5064172114485613206207693076726050083909428955698562235790769997156508910173442170762152215368872437197927857170866577662895966991689498982424401389598364519762523365138205899688933214806386344880613545923462689959965979444541463040846331675936557932760592554598256352773620933
# 2^2654+1 Aurifeuillian L, difficulty: 399.77, skewness: 1.09
# cost: 1.58585e+23, est. time: 75516474.09 GHz days (not accurate yet!)
# Optimized skew: 1.13516 Murphy: 1.71e-18
skew: 1.13516
c8: 1
c4: -2
c0: 2
Y1: -1
Y0: 93536104789177786765035829293842113257979682750464
type: snfs