is 2 12045437 - 1
has 3626038 decimal digits
takes 4.637 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LECF36BF031C4994Bdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27279.393966.6667 %1549173944995533.69196.1897 %83.085868.7299 %
Target2684.948364.7059 %80000100000000.34642.9428 %5.294765.7445 %
Difference+4+74.4455+1.9608 %+1469173+84499553+3.3455+3.2470%+77.7911+2.9854 %

Known prime factors (1 factor, 81.0 bits, 0.00067250% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1204543724276109671658312809515292581.006100768903908003972
22 × 32 × 53 × 809 × 1987 × 32855023
2021-11-2019873285502361,8831.00031.8664

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2004-07-13delta_tv4_computers7000012775006--0.0762.582%
2004-07-26ivanv4_computers65000780000--0.0582.245%
2004-08-06delta_tv4_computers7000012775006--0.0762.582%
2004-08-20delta_tv4_computers7000012775006--0.0762.582%
2005-12-24delta_tv4_computers7000012775006--0.0762.582%
2006-01-15delta_tv4_computers7000012775006--0.0762.582%
2011-02-03Roman Maznichenkox64-Second20000040000006--0.2273.976%
2021-11-20lycornsupernova15491739449955322581.0063.6928.666%


Trial Factoring results:
57585960616263646566676869707172
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-02-23ANONYMOUSv4_computers212640.163
2013-09-22lycornManual testing2642650.310
2013-10-04NesowaManual testing2652660.620
2015-02-07ThaManual testing2662671.241
2015-05-25ThaManual testing2672682.482
2017-10-27ramgeisManual testing2682694.963
2021-08-07SRBaseManual testing2692709.93
2021-08-18SRBaseManual testing27027119.85
2021-10-26ANONYMOUSManual testing27127239.70


ECM factoring results:
Total ECM effort:1.171 GHz-days
Estimated T-Level:0.385
DigitsB1CompleteFacMiss
20110000.07792.596%
25500000.00799.291%


ECM Summary

B1B2factorcurvesGHz-days
50000500000021.171


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2001-03-17ANONYMOUSv4_computersECF36BF031C4994B4.637
2004-11-03ivanv4_computersECF36BF031C4994B4.637


PRP results:
dateuseridcompidcofactorsres64
2022-01-13NesowaLaptop
2427610967165831280951529
693A8685820D3527
2022-01-13Joe S.11600k
2427610967165831280951529
693A8685820D3527


CERT results:
dateuseridcompid
2022-01-13dAvId_mOorE15p010dx_2_


P-1 factor-bounds graph:
B1 = 1549173, B2 = 94499553 (P-1 stage 2)
B1 = 1549173 (P-1 stage 1)
B1 = 200000, B2 = 4000000 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
B1 = 70000, B2 = 1277500 (P-1 stage 2)
B1 = 65000, B2 = 780000 (P-1 stage 2)
B1 = 70000 (P-1 stage 1)
B1 = 65000 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
TF factor-bounds graph:
272
271
270
269
268
267
266
265
264
this exponent TF target: 68
TF double-checked to: 67
ECM T-Level=0.38 ~= -15-bit
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Last modified: 2024-03-13T02:15:48+00:00