is 2 5553277 - 1
has 1671703 decimal digits
takes 0.877 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LFBD21A8BA25BD8DBdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual272172.210768.0556%33500098825000.19583.0729%172.406569.0372%0.9816%
PrimeNet2620.110662.9032%240005500000.01213.1664%0.122764.0778%1.1746%
GPU722662.659465.1515%340007000000.01612.1571%2.675565.9032%0.7517%
Difference+6+169.5513+2.9040%+301000+9182500+0.1797+0.9158%+169.7310+3.1339%+3.1339%

Known prime factors:
No known factors for M5553277

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-08-01T00:00:00ANONYMOUSv4_computers25000225000---0.008--0.596%
2000-10-28T00:00:00ANONYMOUSv4_computers2000060000---0.005--0.323%
2010-11-25T16:15:00Squeeky_SquirrelP4_2600650001121250---0.028--1.302%
2019-09-22T10:24:26GdSManual testing200000600000012---0.118--2.524%
2019-09-26T02:35:12harleei5-5250U_1600335000988250012---0.196--3.073%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:39:10Mark RoseManual testing21262--0.111--
2009-04-23T19:20:00GrunwalderGIMPManual testing262263--0.177--
2014-12-14T20:34:00NesowaManual testing263264--0.354--
2014-12-15T04:13:00monstManual testing264265--0.673--
2015-09-02T11:00:00snme2pm1Manual testing265266--1.346--
2016-07-27T13:19:56Gordon SpenceManual testing266267--2.691--
2018-07-05T15:04:29ramgeisManual testing267268--5.383--
2020-09-21T11:16:50TJAOIManual testing268269--10.77--
2021-08-20T16:50:24SRBaseManual testing269270--21.53--
2021-08-25T14:49:08SRBaseManual testing270271--43.06--
2021-09-21T15:17:11SRBaseManual testing271272--86.12--


ECM factoring results:

Old Calculation Method

Total ECM effort:2.161 GHz-days
Estimated T-Level:0.450
DigitsB1CurvesCompleteFacMiss
20110009 / 1000.09091.352%
25500009 / 2800.03296.831%

New Calculation Method

Total ECM effort:2.161 GHz-days
Estimated T-Level:0.450
DigitsB1CompleteFacMiss
20110000.34670.740%
25500000.03296.848%
302500000.00299.798%


ECM Summary

B1B2factorcurvesGHz-days
50000500000092.161


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-11-15T00:00:00ANONYMOUSv4_computersFBD21A8BA25BD8DB0.877


PRP results:
No PRP results for M5553277


P-1 factor-bounds graph:
B1 = 335000, B2 = 9882500 (P-1 stage 2)
B1 = 200000, B2 = 6000000 (P-1 stage 2)
B1 = 335000 (P-1 stage 1)
B1 = 200000 (P-1 stage 1)
B1 = 65000, B2 = 1121250 (P-1 stage 2)
B1 = 65000 (P-1 stage 1)
B1 = 25000, B2 = 225000 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
B1 = 20000, B2 = 60000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2021-09-21T15:17:11+00:00