2LM

2^2546+1 L

Open composite · C270 · component L

NFS Planning

GNFS Murphy estimate: 4.88e-19
SNFS Murphy score: 4.99e-18
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 8
SNFS skew: 0.97181

Identifiers

Target expression: 2^1273+1-2^637
Target value: 162623940541631235655081880115063836540863472613542262583111130475056375932396254656441241277067565388162837718035640746740368222630054139189686040713708136920689523584206567902705989838462242405834913743283250970036262992894029370642725678061856494659253213923590986861239445901965079151484790668006909579559527135835980469112413272928787503924446013340293625290548750743158831185921
Target link: FactorDB page
Target ID: 1100000000002573941
Target changed: -
Parent query: 2^2546+1
Parent ID: -
Cofactor token: C270
Imported: Jun 03, 2026, 04:30 PM UTC

Raw pmain126 Factorization

(38M,134M) 1234788191657789227862141.2301736698010972028864866222285479748161532407004740672155855821.C270

SNFS Polynomial

Polynomial

Degree: 8
Murphy: 4.99e-18
Skew: 0.97181
Selected: Best

n: 738088625506730019235949367403526581478550245309273539173694268114932460698485101727260142565401099338919422720694818954978049996520449247601833812586706657817399029679413564281851759836742132481331482542064825801135629277279348489397500637006094920915070145613174684969
# 2^2546+1 Aurifeuillian L, difficulty: 383.21, skewness: 0.92
# cost: 6.03723e+22, est. time: 28748713.51 GHz days (not accurate yet!)
# Optimized skew: 0.97181 Murphy: 4.99e-18
skew: 0.97181
c8: 2
c4: -2
c0: 1
Y1: -1
Y0: 730750818665451459101842416358141509827966271488
type: snfs