is 2 15012967 - 1
has 4519354 decimal digits
takes 7.190 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LED7B7F99C506F796double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27263.700566.6667%15000004845580740184.303910.3454%248.004470.1151%3.4485%
PrimeNet2650.486063.0769%6500020000000.11834.1435%0.604364.6068%1.5299%
GPU722697.952265.2174%10000026000000.16402.9937%8.116366.2587%1.0413%
Difference+3+55.7483+1.4493%+1400000+4842980740+184.1399+7.3517%+239.8882+3.8564%+3.8564%

Known prime factors (2 factors, 193.2 bits, 0.00128671% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
15012967236714781466383907172767902312994.257788367753910282714845
3 × 5 × 2083 × 2753 × 92717 × 98851381
2022-03-189271798851381502,355,3723.80066.9848
150129675983398329566113990662080229213098.91719927434495680014452380
22 × 5 × 7 × 11 × 71 × 83 × 2195807318795579
2022-04-078321958073187955797.126e+983,072,270155,155,867

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
1501296714163588280095691894346674023185130136814458527315
356884751
59193.174
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-03-03T00:00:00ANONYMOUSv4_computers1700002422500---0.203--2.295%
2020-06-13T07:33:03ThaZ-1705000002000000012---1.085--4.253%
2022-03-18T21:39:51Luminescence5950X2150000048455807402994.257184.314.38368.610.345%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-04-07T07:34:06ATH5960X10000003100000027P+13098.9172.168


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-01-08T00:00:00ANONYMOUSv4_computers21265--0.486--
2014-06-11T15:16:00NesowaManual testing265266--0.498--
2014-06-11T15:16:00NesowaManual testing266267--0.996--
2015-10-26T19:40:31mikrManual testing267268--1.991--
2017-09-30T18:03:32ramgeisManual testing268269--3.982--
2020-06-05T15:44:18YxinityManual testing269270--7.964--
2021-09-02T17:59:42SRBaseManual testing270271--15.93--
2021-10-10T11:55:08-Anonymous-Manual testing271272--31.86--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.728 GHz-days
Estimated T-Level:0.050
DigitsB1CurvesCompleteFacMiss
20110001 / 1000.01099.000%
25500001 / 2800.00499.643%

New Calculation Method

Total ECM effort:0.728 GHz-days
Estimated T-Level:0.050
DigitsB1CompleteFacMiss
20110000.03296.826%
25500000.00399.709%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.728


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-09-29T00:00:00ANONYMOUSv4_computersED7B7F99C506F7967.190
2005-09-03T00:00:00ANONYMOUSv4_computersFD1BE6DB4530A2__7.190
2006-06-13T00:00:00sasaki3v4_computersED7B7F99C506F7967.190


PRP results:
No PRP results for M15012967


P-1 factor-bounds graph:
B1 = 1500000, B2 = 4845580740 (P-1 stage 2)
B1 = 1000000, B2 = 31000000 (P+1 stage 2)
B1 = 500000, B2 = 20000000 (P-1 stage 2)
B1 = 1500000 (P-1 stage 1)
B1 = 1000000 (P+1 stage 1)
B1 = 500000 (P-1 stage 1)
B1 = 170000, B2 = 2422500 (P-1 stage 2)
B1 = 170000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-04-07T07:34:06+00:00