is 2 12379229 - 1
has 3726520 decimal digits
takes 4.766 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
factored, 0 LL tests remaining
ResidueStatus
L-LD26A9DC9B41FF641double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2684.814964.7059%4000002662705508.30988.6437%13.124767.7566%
Target2684.814964.7059%9000022000000.11443.0859%4.929365.7950%
Difference---+310000+264070550+8.1953+5.5578%+8.1953+1.9616%

Known prime factors (1 factor, 66.1 bits, 0.00053374% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
12379229776175677254954144972066.0733134991998512
24 × 11 × 12517 × 1423061
2015-03-131251714230611.97490.04990.0808

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-08-24ANONYMOUSv4_computers1600003200000---0.182--3.685%
2022-02-17nordisweet16_30.8b10400000400000---0.223--2.150%
2022-03-05nordisweet16_30.8b10400000266270550-
skipped known factor: 77617567725495414497
--8.310--8.644%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-05-31kutensv4_computers21264--0.288--
2013-07-22lycornManual testing264265--0.302--
2013-09-18NesowaManual testing265266--0.604--
2015-03-13ThaManual testing26626766.073200.78212.061.979
2022-04-10LordJuliusManual testing267268--2.415--


ECM factoring results:
No ECM results for M12379229


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2001-11-03ANONYMOUSv4_computersD26A9DC9B41FF6414.766
2004-09-16ANONYMOUSv4_computersD26A9DC9B41FF6414.766


PRP results:
dateuseridcompidcofactorsres64PRP
2022-03-22krackerGRID-11
77617567725495414497
92AFC4B11609AD__no
2022-03-23ATHec2-PRPCF
77617567725495414497
92AFC4B11609ADBAno


P-1 factor-bounds graph:
B1 = 400000, B2 = 266270550 (P-1 stage 2)
B1 = 400000 (P-1 stage 1)
B1 = 160000, B2 = 3200000 (P-1 stage 2)
B1 = 160000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
109
TF factor-bounds graph:
268
267
266
265
264
this exponent TF target: 68
TF double-checked to: 67.7
250
260
270
Last modified: 2023-03-25T13:08:14+00:00