2^1315-1

Open composite · C275

NFS Planning

GNFS Murphy estimate: 2.50e-19
SNFS Murphy score: 2.52e-16
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 8
SNFS skew: 0.79798

Identifiers

Target expression: 2^1315-1
Target link: FactorDB page
Target ID: 1000000000000001315
Target changed: -
Parent query: Same as target
Parent ID: -
Cofactor token: C275
Imported: Jun 03, 2026, 04:29 PM UTC

Raw pmain126 Factorization

(5,263) 20821711.6564920264482202699756113871095601. C275

SNFS Polynomial

Polynomial

Degree: 8
Murphy: 2.52e-16
Skew: 0.79798
Selected: Best

n: 11388010915172903176811275042044948968189641477689028518249696786373387456078889167414322817021220810182795179228130862281199006466714239869602622620883739546002372130230146910045839382409877948917933442526589299897410104369344751701260774746479705217886291336669562196239041
# 2^1315-1, difficulty: 316.68, skewness: 0.71
# cost: 9.44817e+20, est. time: 449912.73 GHz days (not accurate yet!)
# Optimized skew: 0.79798 Murphy: 2.52e-16
skew: 0.79798
c8: 16
c6: 8
c4: 4
c2: 2
c0: 1
Y1: -1
Y0: 2722258935367507707706996859454145691648
type: snfs