2LM

2^2978+1 L

Open composite · C444 · component L

NFS Planning

GNFS Murphy estimate: 3.95e-29
SNFS Murphy score: 6.94e-20
Preferred method: SNFS
SNFS possible: Yes
SNFS degree: 8
SNFS skew: 0.87096

Identifiers

Target expression: 2^1489+1-2^745
Target value: 17126299858610370482240033183730887692150398379067787511755760754292462817657872169754434026652817022291577347068084725292624291475327128786216327596681982835883767815102098273675196636515362766863614347822333315161794657355745756732424568663058888830195135199632289622918270588272588002600051691413517183740029100921497352735227523000866937185469584338118645120159463061051705255365759615741415841322237459768372604888557840881766738657249884897281
Target link: FactorDB page
Target ID: 1100000000000689020
Target changed: -
Parent query: 2^2978+1
Parent ID: -
Cofactor token: C444
Imported: Jun 03, 2026, 04:30 PM UTC

Raw pmain126 Factorization

59561. C444

SNFS Polynomial

Polynomial

Degree: 8
Murphy: 6.94e-20
Skew: 0.87096
Selected: Best

n: 287542181269796855026611930352594612114477567184362040794408434282373748218765167974923759282967327987971614765838127722714935804894597619016073061175634775035405178138414369699555021516014888381048242101750026278299468735510581701657537124344099139205102923047502386174145339874625812236195693346544167890734358068559919288380442286074225368705521806855469940399917111214581777595503091213065862583271561252638011532522251823874124656356506521
# 2^2978+1 Aurifeuillian L, difficulty: 448.23, skewness: 0.92
# cost: 2.3494e+24, est. time: 1118763679.50 GHz days (not accurate yet!)
# Optimized skew: 0.87096 Murphy: 6.94e-20
skew: 0.87096
c8: 2
c4: -2
c0: 1
Y1: -1
Y0: 98079714615416886934934209737619787751599303819750539264
type: snfs