3+

3^857+1

Open composite · C247

Target FactorDB

NFS Planning

GNFS Murphy estimate
1.05e-17
SNFS Murphy raw
1.00e-18
SNFS Murphy normalized (deg 6)
6.26e-19
Preferred method
GNFS
SNFS possible
Yes
SNFS degree
7
SNFS skew
1.25747

Identifiers

Target expression
3^857+1
Target link
FactorDB page
Target ID
1000000000016447155
Target changed
Before 6/8/2026
Parent query
Same as target
Parent ID
-
Cofactor token
C247
Imported
Jun 07, 2026, 01:42 AM UTC

Raw pmain126 Factorization

(1) 172111578154043677495893690382311621991603257465247.17128232459465279066549337628151174948999801430782143.77864943890864034301254882369931862721764026866840598708249.C247

SNFS Polynomial

Degree
7
Raw Murphy
1.00e-18
Normalized (deg 6)
6.26e-19
Skew
1.25747
Selected
Best
n: 8511197987006319007473757547480439568376627912480094198033756077942892675003124016559744693719364587983427670472743425374640720163770956427551621841634841252790987131115679628248766906592371779921232716406794933829134941454450338181709250923937329
# 3^857+1, difficulty: 408.89, skewness: 1.60
# cost: 2.67278e+23, est. time: 127275049.93 GHz days (not accurate yet!)
# Optimized skew: 1.25747 Murphy: 1.00e-18
skew: 1.25747
c7: 1
c0: 27
Y1: -16173092699229880893718618465586445357583280647840659957609
Y0: 1
type: snfs