is 2 14007157 - 1
has 4216575 decimal digits
takes 6.215 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-L6B271A90FF72B7DAdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual27134.131066.1972 %60000001600000009.25788.2716 %43.388868.9932 %
Target2698.523365.2174 %90000120000000.47542.8533 %8.998666.2098 %
Difference+2+25.6077+0.9798 %+5910000+148000000+8.7825+5.4184%+34.3902+2.7834 %

Known prime factors (1 factor, 95.5 bits, 0.00068148% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
14007157543226121704983119597126820712995.4561939101995162127188255
5 × 83 × 120503 × 2041943 × 18989393
2020-07-292041943189893931.024e+91.90772.6735

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2020-07-29masserManual testing60000001600000001222995.4569.2589.616%


Trial Factoring results:
575859606162636465666768697071
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-08-17ANONYMOUSv4_computers212650.267
2014-07-22NesowaManual testing2652660.533
2015-08-18ThaManual testing2662671.067
2018-02-05ramgeisManual testing2672696.402
2018-09-10mikrManual testing2692708.536
2020-04-27masserManual testing27027117.07


ECM factoring results:
Total ECM effort:8.096 GHz-days
Estimated T-Level:2.308
DigitsB1CompleteFacMiss
20110000.46263.031%
25500000.04395.819%
302500000.00399.731%


ECM Summary

B1B2factorcurvesGHz-days
500005000000128.096


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2005-04-02ANONYMOUSv4_computers6B271A90FF72B7DA6.215
2006-03-14ANONYMOUSv4_computers6B271A90FF72B7DA6.215
2006-03-14ANONYMOUSv4_computers6B271A90FF72B7DA6.215


PRP results:
dateuseridcompidcofactorsres64
2022-12-07krackerO2
54322612170498311959712682071
30D46395A79B8ABD


CERT results:
dateuseridcompid
2022-12-07Nemosoft Unv.void


P-1 factor-bounds graph:
B1 = 6000000, B2 = 160000000 (P-1 stage 2)
B1 = 6000000 (P-1 stage 1)
105
106
107
105
106
107
108
109
TF factor-bounds graph:
271
270
269
267
266
265
this exponent TF target: 69
TF double-checked to: 67
ECM T-Level=2.31 ~= -9-bit
250
260
270
280
290
2100
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Last modified: 2024-03-13T02:15:48+00:00