is 2 15051823 - 1
has 4531051 decimal digits
takes 7.208 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LA2A01A97A2097006double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual273127.083967.1233%30000060000000.42402.7921%127.507968.0412%0.9180%
PrimeNet2650.484763.0769%6500020000000.11834.1450%0.603064.6074%1.5305%
GPU722697.931765.2174%10000026000000.16402.9948%8.095766.2591%1.0417%
Difference+4+119.1522+1.9059%+200000+3400000+0.2599-0.2027%+119.4121+1.7822%+1.7822%

Known prime factors (1 factor, 75.0 bits, 0.00049820% known):
Remaining cofactor is PRP status unknown

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
15051823374636709956297007189612374.9881244489487938760
23 × 3 × 5 × 7 × 208673 × 7099793
2022-04-142086737099793346.610.40560.5017

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2002-07-14T00:00:00curtiscv4_computers225000225000---0.156--0.904%
2015-09-17T22:50:00ThaManual testing3000006000000---0.424--2.792%


P+1 Factoring results:
dateuseridcompidb1b2startfactorSmoothdigitsbits*ghz-days
2022-04-14T14:26:56ATH5960X10000003100000027P-12374.9882.168


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2000-12-31T00:00:00Net_Forcev4_computers21257--0.001--
2001-05-06T00:00:00ANONYMOUSv4_computers21265--0.485--
2014-06-11T15:21:00NesowaManual testing265266--0.496--
2014-06-11T15:21:00NesowaManual testing266267--0.993--
2016-02-01T15:20:07mikrManual testing267268--1.986--
2017-10-04T12:12:47ramgeisManual testing268269--3.972--
2020-07-12T13:12:28YxinityManual testing269270--7.943--
2021-09-02T18:06:34SRBaseManual testing270271--15.89--
2021-10-09T10:08:59-Anonymous-Manual testing271272--31.77--
2022-03-06T10:21:01Dylan DelgadoGPU72_TF272273--63.55--


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)
2002-08-24T00:00:00curtiscv4_computersA2A01A97A20970067.208
2005-09-22T00:00:00davyv4_computersA2A01A97A20970067.208


PRP results:
No PRP results for M15051823


P-1 factor-bounds graph:
B1 = 1000000, B2 = 31000000 (P-1 stage 2)
B1 = 1000000 (P-1 stage 1)
B1 = 300000, B2 = 6000000 (P-1 stage 2)
B1 = 300000 (P-1 stage 1)
B1 = 225000 (P-1 stage 1)
104
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104
105
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108
TF factor-bounds graph:
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2100
Last modified: 2022-04-14T14:26:56+00:00