2+(odd)

2^1489+1

Open composite · C421

NFS Planning

GNFS Murphy estimate: 8.52e-28
SNFS Murphy raw: 4.64e-20
SNFS Murphy normalized (deg 6): 2.90e-20
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 7
SNFS skew: 1.56475

Identifiers

Target expression: 2^1489+1
Target link: FactorDB page
Target ID: 1000000000012151513
Target changed: Before 6/8/2026
Parent query: Same as target
Parent ID: -
Cofactor token: C421
Imported: Jun 07, 2026, 01:41 AM UTC

Raw pmain126 Factorization

(1) 12344417513.98860422229961209. C421

SNFS Polynomial

Polynomial

Degree: 7
Raw Murphy: 4.64e-20
Normalized (deg 6): 2.90e-20
Skew: 1.56475
Selected: Best

n: 4677881606332041316390407960953509616957609110685959208604388899417769253901197356527266736133895372596537686649047187983504848106416506092023907728337152805547672965610431901279407902433092015716536413861409120641758967746672928594492171643709443039985346267980613801310979741739492191819235784724884919916626461581215035664311893224183411624773326743848868050320571930798429490130598211127755244224772916438060810217163
# 2^1489+1, difficulty: 448.84, skewness: 1.22
# cost: 2.42666e+24, est. time: 1155550853.70 GHz days (not accurate yet!)
# Optimized skew: 1.56475 Murphy: 4.64e-20
skew: 1.56475
c7: 1
c0: 4
Y1: -1
Y0: 13164036458569648337239753460458804039861886925068638906788872192
type: snfs