2^1415-1

Open composite · C217

NFS Planning

GNFS Murphy estimate: 5.79e-16
SNFS Murphy score: 5.80e-17
Preferred method: GNFS
SNFS possible: Yes
SNFS degree: 8
SNFS skew: 0.78529

Identifiers

Target expression: 2^1415-1
Target link: FactorDB page
Target ID: 1000000000000001415
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C217
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

(5,283) 79241.815425615801.39826723601148990271.1478507524858138362374651451547163263681391.217324465815675834842001173711247406035110681.C217

SNFS Polynomial

Polynomial

Degree: 8
Murphy: 5.80e-17
Skew: 0.78529
Selected: Best

n: 2275895724059115978911640764402070687939466980098527866450222087949749610666074430702033682923305395389866154429439332286478438359960293079985204918307175267543544148855624154244194450573074779208445827961537316667271
# 2^1415-1, difficulty: 340.77, skewness: 0.71
# cost: 4.4992e+21, est. time: 2142475.05 GHz days (not accurate yet!)
# Optimized skew: 0.78529 Murphy: 5.80e-17
skew: 0.78529
c8: 16
c6: 8
c4: 4
c2: 2
c0: 1
Y1: -1
Y0: 2787593149816327892691964784081045188247552
type: snfs