is 2 61893703 - 1
has 18631862 decimal digits
takes 145.393 GHz-days to do one PRP test
Last-known PrimeNet details:
Assigned as ll_dc on 2022-06-08, 41.1% done, ETC 2022-07-04
1 primality tests remaining
ResidueStatus
L-L52711AC3D55BCE__
needs double-check
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual27461.813564.8649%585000117000004.05533.8319%65.868866.2112%1.3463%
PrimeNet2703.860762.8571%260000120000003.06435.1415%6.924964.7668%1.9097%
GPU7227461.813564.8649%400000130000003.70073.7210%65.514266.1722%1.3074%
Difference---+185000-1300000+0.3546+0.1109%+0.3546+0.0390%+0.0390%

Known prime factors:
No known factors for M61893703

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2013-04-26T06:45:00Jimmy BrüggemanniMac258500011700000---4.055--3.832%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-06-17T00:00:00ANONYMOUSv4_computers21259--0.001--
2003-12-13T00:00:00ANONYMOUSv4_computers21260--0.002--
2004-04-20T00:00:00ANONYMOUSv4_computers21262--0.010--
2016-02-23T17:18:09Mark RoseManual testing262263--0.016--
2009-02-09T00:35:00Thomasegcj5mtv263264--0.032--
2009-02-19T01:22:00ANONYMOUS264265--0.060--
2009-02-20T05:59:00SDSA265266--0.121--
2009-03-14T00:13:00ANONYMOUSnode1266267--0.241--
2009-03-18T20:07:00ANONYMOUS267268--0.483--
2009-07-21T07:59:00ANONYMOUSHHS-C0268269--0.966--
2011-11-24T21:03:00sannerud.comJens2010269270--1.932--
2013-02-09T16:35:00XyzzyManual testing270271--3.864--
2013-02-12T23:40:00Jerry HallettManual testing271272--7.727--
2013-02-23T08:56:00BdotManual testing272273--15.45--
2014-07-05T21:39:00Jerry HallettManual testing273274--30.91--


ECM factoring results:
No ECM results for M61893703


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2014-08-12T22:24:00Amazon EC252711AC3D55BCE__145.4


PRP results:
No PRP results for M61893703


P-1 factor-bounds graph:
B1 = 585000, B2 = 11700000 (P-1 stage 2)
B1 = 585000 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-07-02T15:07:02+00:00