2+(odd)

2^1445+1

Open composite · C240

NFS Planning

GNFS Murphy estimate: 2.68e-17
SNFS Murphy score: 4.68e-17
Preferred method: Similar
SNFS possible: Yes
SNFS degree: 8
SNFS skew: 0.77207

Identifiers

Target expression: 2^1445+1
Target link: FactorDB page
Target ID: 1000000000012151469
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C240
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

(1,5,17,85,289) 354429601.4715936681.302366166736211.10245148601520066233751956853483648115748723702066388521.C240

SNFS Polynomial

Polynomial

Degree: 8
Murphy: 4.68e-17
Skew: 0.77207
Selected: Best

n: 640455837471009590036716816415522660175424569507143846822623381190512616022803762677601327733692326210455795401046710575626587376420738188486569124492625806901666610471694674225425312286179363784552734484235192601807754093627368890029857611
# 2^1445+1, difficulty: 347.99, skewness: 0.71
# cost: 7.09291e+21, est. time: 3377575.75 GHz days (not accurate yet!)
# Optimized skew: 0.77207 Murphy: 4.68e-17
skew: 0.77207
c8: 16
c6: -8
c4: 4
c2: -2
c0: 1
Y1: -1
Y0: 22300745198530623141535718272648361505980416
type: snfs