2LM

2^2758+1 L

Open composite · C355 · component L

NFS Planning

GNFS Murphy estimate: 5.74e-24
SNFS Murphy score: 2.59e-17
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 6
SNFS skew: 2.02555

Identifiers

Target expression: 2^1379+1-2^690
Target value: 13193621493701038430448504537045900406757448004096791230650498070070559996157273720489958822683506634344767347414970061239187977491845420458401026812292421786270653648963189193718041878489518736190709282509084130561783823564254011567106764815121460152062278572461338691542880346032169200590105130071588279922156821651720981845813353976247805711064497396906626076895843343835342928320655447628712858718040930453028865
Target link: FactorDB page
Target ID: 1100000000001369373
Target changed: -
Parent query: 2^2758+1
Parent ID: -
Cofactor token: C355
Imported: Jun 03, 2026, 04:30 PM UTC

Raw pmain126 Factorization

(2,14M,394L) C355

SNFS Polynomial

Polynomial

Degree: 6
Murphy: 2.59e-17
Skew: 2.02555
Selected: Best

n: 2264940913810171011308785497219081408368064640889632649766026622934467098170930438257592316222355758322548311913507218949644401029361895255450010717908534886251217351361268359298963867684715045374066196854341207836819681880093492778088526652398320606215961543995196651171683828358259952423680676993950971065140805978246371140532683444375571989327676359221
# 2^2758+1 Aurifeuillian L, difficulty: 355.82, skewness: 1.41
# cost: 1.15404e+22, est. time: 5495442.89 GHz days (not accurate yet!)
# Optimized skew: 2.02555 Murphy: 2.59e-17
skew: 2.02555
c6: 1
c5: 2
c4: -10
c3: -20
c2: 16
c1: 32
c0: 8
Y1: -316912650057057350374175801344
Y0: 200867255532373784442745261542645325315275374222849104412673
type: snfs