2LM

2^2474+1 L

Open composite · C294 · component L

Target FactorDB

NFS Planning

GNFS Murphy estimate
1.98e-20
SNFS Murphy raw
5.21e-18
SNFS Murphy normalized (deg 6)
5.21e-18
Preferred method
SNFS
SNFS possible
Yes
SNFS degree
6
SNFS skew
1.24132

Identifiers

Target expression
2^1237+1-2^619
Target value
2366489796864789032480357565728828726290717497082983937916449656405258806369911394088430697987024401491549182072567647944966567194643054087496217699862727559530896885323550201467965814493258089670878643710358583324808955647987658020731298490523896713156056687205170562736559195615975008622091435218871116232240361505159530333409491117153010486517133298187265731966936285185
Target link
FactorDB page
Target ID
1100000000000961691
Target changed
Before 6/8/2026
Parent query
2^2474+1
Parent ID
1000000000012152498
Cofactor token
C294
Imported
Jun 07, 2026, 01:41 AM UTC

Raw pmain126 Factorization

(2) 601825241.153070379975682596689.27420027477050075397644756417278311816360928292293.C294

SNFS Polynomial

Degree
6
Raw Murphy
5.21e-18
Normalized (deg 6)
5.21e-18
Skew
1.24132
Selected
Best
n: 187372213652241382964090100106286312133587442235601736772195259708944886465297813222412705731014619556537036088942196358777037261331549174466771664880789185332960344695145326908538729700463155154743251548639834631073383314225232310688587856029283491912908847085475771226221510361961871339074241
# 2^2474+1 Aurifeuillian L, difficulty: 372.37, skewness: 0.89
# cost: 3.16496e+22, est. time: 15071228.40 GHz days (not accurate yet!)
# Optimized skew: 1.24132 Murphy: 5.21e-18
skew: 1.24132
c6: 2
c3: -2
c0: 1
Y1: -1
Y0: 102844034832575377634685573909834406561420991602098741459288064
type: snfs