is 2 15144347 - 1
has 4558903 decimal digits
takes 7.595 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L631AB7E7AF29A471double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual273126.307567.1233 %15000004336061730172.82929.4839 %299.136770.2413 %
Target2697.883365.2174 %100000130000000.58382.9975 %8.467166.2600 %
Difference+4+118.4242+1.9059 %+1400000+4323061730+172.2453+6.4863%+290.6696+3.9813 %

Known prime factors:
No known factors for M15144347

P-1 results:
dateusercompB1B2BSstagefactordigitsbits*GHz-daysFac Prob
2002-06-09ANONYMOUSv4_computers1850004440000--0.3033.728%
2022-03-15Luminescence5950X215000004336061730--209.612.756%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-11-05ATHec2-P_110000002900000027--2.193


Trial Factoring results:
5758596061626364656667686970717273
 BitsFactor
dateuseridcompidfromtofactorbits*digitsGHz-days
2000-12-31Net_Forcev4_computers212580.004
2001-05-20ANONYMOUSv4_computers212650.247
2016-03-16Mark RoseManual testing265266
2014-05-14NesowaManual testing2662670.987
2017-12-24ramgeisManual testing2672695.921
2021-06-30lycornManual testing2692707.895
2021-09-02SRBaseManual testing27027115.79
2021-10-09ANONYMOUSManual testing27127231.58
2023-07-06Sid & AndyManual testing27227363.16


ECM factoring results:
Total ECM effort:0.728 GHz-days
Estimated T-Level:0.192
DigitsB1CompleteFacMiss
20110000.03896.227%
25500000.00499.645%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010.728


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2002-06-23ANONYMOUSv4_computers59A892F7DEA045B47.595
2005-10-04penguin22v4_computers631AB7E7AF29A4717.595
2006-08-25Team Prime Ribv4_computers631AB7E7AF29A4717.595


PRP results:
No PRP results for M15144347


CERT results:
No CERT results for M15144347


P-1 factor-bounds graph:
B1 = 1500000, B2 = 4336061730 (P-1 stage 2)
B1 = 1500000 (P-1 stage 1)
B1 = 185000, B2 = 4440000 (P-1 stage 2)
B1 = 185000 (P-1 stage 1)
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105
106
107
104
105
106
107
108
109
1010
TF factor-bounds graph:
273
272
271
270
269
267
266
265
258
this exponent TF target: 69
TF double-checked to: 67
ECM T-Level=0.19 ~= -16-bit
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280
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Last modified: 2024-03-13T02:15:48+00:00