is 2 2175629 - 1
has 654930 decimal digits
takes 0.143 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LB2B4B39A535597E6double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26954.874668.1159%50000002000000001.48968.2813%56.364270.7564%2.6404%
PrimeNet2580.017662.0690%100001800000.00182.8572%0.019563.1527%1.0838%
GPU722620.282464.5161%110001600000.00181.5681%0.284265.0726%0.5564%
Difference+7+54.5922+3.5998%+4989000+199840000+1.4877+6.7132%+56.0800+5.6838%+5.6838%

Known prime factors:
No known factors for M2175629

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-03-07T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.182%
2010-11-05T01:17:00Jocelyn LaroucheManual testing1500015000---0.001--0.165%
2010-11-07T21:16:00Jocelyn LaroucheManual testing3000030000---0.003--0.300%
2011-01-15T06:49:00markrtiny900001620000---0.017--1.949%
2014-06-13T02:40:00Jocelyn LaroucheManual testing119501119501---0.011--0.773%
2014-10-05T22:22:00Jocelyn LaroucheManual testing149002149002---0.014--0.878%
2015-12-22T14:03:56HBendtzManual testing7000002100000012---0.172--4.735%
2019-11-18T18:51:55mikrMSI500000020000000012---1.490--8.281%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-01-29T00:00:00ANONYMOUSv4_computers21258--0.018--
2016-02-23T16:29:07Mark RoseManual testing258260--0.053--
2009-01-04T18:39:00Sturle Sundeantonov.ifi260261--0.071--
2009-01-06T22:35:00Sturle Sundegonsha.ifi261262--0.141--
2013-01-23T08:20:00dbaughManual testing262263--0.451--
2015-03-25T10:09:00VictordeHollanderManual testing263264--0.902--
2015-03-25T10:09:00VictordeHollanderManual testing264265--1.717--
2016-01-02T13:50:57ramgeisManual testing265266--3.435--
2016-11-17T17:00:11Gordon SpenceManual testing266267--6.869--
2019-04-29T13:20:33TJAOIManual testing267268--13.74--
2021-07-15T09:28:28TJAOIManual testing268269--27.48--


ECM factoring results:

Old Calculation Method

Total ECM effort:17.184 GHz-days
Estimated T-Level:23.554
DigitsB1CurvesCompleteFacMiss
2011000199 / 1001.99013.533%
2550000199 / 2800.71149.067%

New Calculation Method

Total ECM effort:17.184 GHz-days
Estimated T-Level:23.554
DigitsB1CompleteFacMiss
20110007.6990.045%
25500000.71249.052%
302500000.04595.604%
3510000000.00299.790%


ECM Summary

B1B2factorcurvesGHz-days
50000500000017815.22
50000515000070.606
50000661704770.678
50000675000070.684


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15T00:00:00Ethan O'Connorv4_computersB2B4B39A535597E60.143
2018-04-12T20:57:23kkmrkkblmbrbkoldB2B4B39A535597E60.143


PRP results:
No PRP results for M2175629


P-1 factor-bounds graph:
B1 = 5000000, B2 = 200000000 (P-1 stage 2)
B1 = 5000000 (P-1 stage 1)
B1 = 700000, B2 = 21000000 (P-1 stage 2)
B1 = 700000 (P-1 stage 1)
B1 = 90000, B2 = 1620000 (P-1 stage 2)
B1 = 149002 (P-1 stage 1)
B1 = 119501 (P-1 stage 1)
B1 = 90000 (P-1 stage 1)
B1 = 30000 (P-1 stage 1)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-04-23T13:19:53+00:00