is 2 12067273 - 1
has 3632612 decimal digits
takes 4.646 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LD95CAA090988FCF3double-checked
PRPB3F76C8CB9830D5FPRP-tested

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual2684.939464.7059%14000019250000.13243.2072%5.071865.8378%
Target2684.939464.7059%8000020000000.10312.9436%5.042465.7448%
Difference---+60000-75000+0.0294+0.2636%+0.0294+0.0931%

Known prime factors (1 factor, 66.2 bits, 0.00054895% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
12067273873457580614745844732066.2433619117511532
22 × 33 × 19 × 23 × 43 × 1783319
2015-02-084317833192.12780.05430.1013

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-01-08ANONYMOUSv4_computers1400001925000---0.132--3.207%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-02-23ANONYMOUSv4_computers21264--0.295--
2013-09-23lycornManual testing264265--0.310--
2013-10-03NesowaManual testing265266--0.619--
2015-02-08ThaManual testing26626766.243200.9049.4531.839
2022-04-10LordJuliusManual testing267268--2.477--


ECM factoring results:
No ECM results for M12067273


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-02-10ANONYMOUSv4_computersD95CAA090988FCF34.646
2004-05-25Team Prime Ribv4_computersD95CAA090988FCF34.646
2004-07-26ANONYMOUSv4_computersD95CAA090988FCF34.646


PRP results:
dateuseridcompidcofactorsres64PRP
2022-01-14RichD0Linux-5
87345758061474584473
B3F76C8CB9830D5Fno


P-1 factor-bounds graph:
B1 = 140000, B2 = 1925000 (P-1 stage 2)
B1 = 140000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
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107
TF factor-bounds graph:
268
267
266
265
264
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270
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290
2100
Last modified: 2022-04-10T07:00:40+00:00