is 2 3046921 - 1
has 917215 decimal digits
takes 0.259 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L87BF2A3DD6275705double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual271156.905469.0141%32542451185491970716.269411.1300%173.174772.4628%3.4487%
PrimeNet2600.050463.3333%120002200000.00292.5223%0.053364.2582%0.9249%
GPU722641.168265.6250%130002200000.00301.4307%1.171266.1168%0.4918%
Difference+7+155.7372+3.3891%+32529451+1854699707+16.2664+9.6993%+172.0036+6.3460%+6.3460%

Known prime factors:
No known factors for M3046921

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-12-23T00:00:00Team Prime Ribv4_computers1000010000---0.001--0.081%
2004-02-07T00:00:00ANONYMOUSv4_computers2048204800---0.002--0.129%
2010-10-03T07:34:00markrtiny1100002420000---0.029--1.857%
2016-03-12T16:38:08Squeeky_SquirrelP4_2600205000568875012---0.062--2.572%
2017-09-10T09:42:38mikrMSI300000010000000012---1.022--6.271%
2021-04-13T05:36:20oodairacom532542451185491970712---16.27--11.130%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-04-29T00:00:00ANONYMOUSv4_computers21260--0.050--
2009-02-13T05:26:00Sturle Sundegonsha.ifi260261--0.050--
2010-11-10T00:51:00Sid & AndyBuzz261262--0.101--
2013-01-07T13:54:00dbaughManual testing262263--0.322--
2015-02-07T18:28:00VictordeHollanderManual testing263264--0.644--
2015-02-07T18:28:00VictordeHollanderManual testing264265--1.226--
2015-06-06T19:31:00ThaManual testing265266--2.453--
2017-05-07T02:13:04Gordon SpenceManual testing266267--4.905--
2018-07-24T12:49:47ramgeisManual testing267268--9.81--
2021-03-25T10:40:25TJAOIManual testing268269--19.62--
2022-05-04T17:25:16mikrManual testing269270--39.24--
2022-06-23T19:56:39mikrManual testing270271--78.48--


ECM factoring results:

Old Calculation Method

Total ECM effort:11.877 GHz-days
Estimated T-Level:21.821
DigitsB1CurvesCompleteFacMiss
2011000102 / 1001.02035.875%
2550000102 / 2800.36469.424%

New Calculation Method

Total ECM effort:11.877 GHz-days
Estimated T-Level:21.821
DigitsB1CompleteFacMiss
20110003.9231.978%
25500000.36369.559%
302500000.02397.736%
3510000000.00199.893%


ECM Summary

B1B2factorcurvesGHz-days
50000500000010211.88


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-08-16T00:00:00ANONYMOUSv4_computers87BF2A3DD62757050.259


PRP results:
No PRP results for M3046921


P-1 factor-bounds graph:
B1 = 32542451, B2 = 1854919707 (P-1 stage 2)
B1 = 32542451 (P-1 stage 1)
B1 = 3000000, B2 = 100000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 205000, B2 = 5688750 (P-1 stage 2)
B1 = 110000, B2 = 2420000 (P-1 stage 2)
B1 = 205000 (P-1 stage 1)
B1 = 110000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 10000 (P-1 stage 1)
B1 = 2048 (P-1 stage 1)
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TF factor-bounds graph:
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Last modified: 2022-06-23T19:56:39+00:00