is 2 18091037 - 1
has 5445945 decimal digits
takes 11.005 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L12676A5384507B0Edouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual273105.734465.7534%21000045150000.39212.5321%106.126566.6206%
Target2696.599263.7681%13000036000000.28143.4560%6.880765.0203%
Difference+4+99.1351+1.9853%+80000+915000+0.1107-0.9239%+99.2458+1.6003%

Known prime factors (1 factor, 125.4 bits, 0.00069294% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
180910375456863037568101487133796974797557006338125.3591508167563188362692291712458163
7 × 421 × 63839 × 98221 × 168737 × 499253 × 968831
2022-02-224992539688319.618e+90.46290.8963

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2004-10-18Architects Cubedv4_computers2100004515000---0.392--2.532%
2022-02-22Sid & AndyMagic_8_Ball1000000100000038125.3590.88222.011.7641.877%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-10-20Net_Forcev4_computers21258--0.002--
2001-10-27Mike Curtisv4_computers21261--0.017--
2002-07-06ANONYMOUSv4_computers21266--0.816--
2014-08-17NesowaManual testing266267--0.826--
2016-06-01mikrManual testing267268--1.652--
2017-09-14ramgeisManual testing268269--3.305--
2020-03-10lycornManual testing269270--6.609--
2021-09-11SRBaseManual testing270271--13.22--
2021-10-08-Anonymous-Manual testing271272--26.44--
2021-11-10gcardonaManual testing272273--52.87--


ECM factoring results:
Total ECM effort:0.925 GHz-days
Estimated T-Level:0.192
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.925


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2005-04-02ANONYMOUSv4_computers12676A5384507B0E11.01
2007-04-07T. Finkev4_computers12676A5384507B0E11.01
2007-04-23ANONYMOUSv4_computers12676A5384507B0E11.01


PRP results:
dateuseridcompidcofactorsres64PRP
2022-11-17Naegi Makoto1700
54568630375681014871337969747975570063
A2FDEAD6753AD43Eno


P-1 factor-bounds graph:
B1 = 1000000 (P-1 stage 1)
B1 = 210000, B2 = 4515000 (P-1 stage 2)
B1 = 210000 (P-1 stage 1)
104
105
106
104
105
106
107
TF factor-bounds graph:
273
272
271
270
269
268
267
266
261
258
250
260
270
280
290
2100
2110
2120
2130
Last modified: 2022-11-17T21:38:12+00:00