2LM

2^2426+1 L

Open composite · C355 · component L

NFS Planning

GNFS Murphy estimate: 5.74e-24
SNFS Murphy score: 1.02e-17
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 6
SNFS skew: 1.23856

Identifiers

Target expression: 2^1213+1-2^607
Target value: 141053783706712069063207958086063189881486743514715667838838675999954867742652380114104193329037690251561950568709829327164087724366370087116731268159313652487450652439805877296207297181154298758274679502132704510418556524124309015935516764847244821858590764638614703991127562561830220822161510161635876041783305498110215595293149046166620603227732647874150021464065
Target link: FactorDB page
Target ID: 1100000000004657770
Target changed: -
Parent query: 2^2426+1
Parent ID: -
Cofactor token: C355
Imported: Jun 03, 2026, 04:30 PM UTC

Raw pmain126 Factorization

(2) 25893760589. C355

SNFS Polynomial

Polynomial

Degree: 6
Murphy: 1.02e-17
Skew: 1.23856
Selected: Best

n: 1089480867191098667674546931650887906349806743512991610280456632980378930023576577481765279706299444472414099747972527507669756839322958081874704307433987702785202826761223958856517851008962989823638393740558612920436749807197416163115176509499199817897804729244264072631938109110245012640033335728281271796718283144470882056730280879222974291227487705217
# 2^2426+1 Aurifeuillian L, difficulty: 365.15, skewness: 0.89
# cost: 2.04479e+22, est. time: 9737102.06 GHz days (not accurate yet!)
# Optimized skew: 1.23856 Murphy: 1.02e-17
skew: 1.23856
c6: 2
c3: -2
c0: 1
Y1: -1
Y0: 6427752177035961102167848369364650410088811975131171341205504
type: snfs