is 2 2297573 - 1
has 691639 decimal digits
takes 0.155 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L72ABEDF11D7A3E8Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbability
Actual26951.962168.1159%960000049498834770265.058915.8429%317.021173.1673%
Target2620.267464.5161%1200010000000.00641.7372%0.273865.1325%
Difference+7+51.6947+3.5998%+9588000+49497834770+265.0525+14.1057%+316.7472+8.0348%

Known prime factors:
No known factors for M2297573

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-08-08ANONYMOUSv4_computers2048204800---0.001--0.185%
2010-11-07Jocelyn LaroucheManual testing1500015000---0.001--0.167%
2010-11-15Jocelyn LaroucheManual testing2000020000---0.002--0.217%
2010-12-04Oscar Östlin7501175011---0.007--0.585%
2011-01-17Oscar Östlin900001755000---0.018--2.006%
2014-07-18Jocelyn LaroucheManual testing117936117936---0.012--0.775%
2014-10-18Jocelyn LaroucheManual testing145872145872---0.014--0.876%
2016-02-13Jocelyn LaroucheManual testing40595040595006---0.059--3.157%
2019-11-21BigBrotherWinston30000009000000012---0.758--7.076%
2022-12-30Jocelyn LaroucheManual testing1000000571651080---3.143--8.210%
2023-03-12Jocelyn LaroucheManual testing10000006014071140---32.19--10.650%
2023-08-25Sid & AndyMagic_8_Ball960000049498834770---265.1--15.843%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-11-07ANONYMOUSv4_computers21258--0.017--
2016-02-23Mark RoseManual testing258260--0.050--
2009-01-15Sturle Sundegonsha.ifi260261--0.067--
2012-05-12Sebastian HornbostelManual testing261262--0.134--
2013-12-07Jerry HallettManual testing262263--0.427--
2015-03-12VictordeHollanderManual testing263264--0.855--
2015-03-12VictordeHollanderManual testing264265--1.626--
2015-11-04ramgeisManual testing265266--3.252--
2017-05-27Gordon SpenceManual testing266267--6.505--
2019-03-25TJAOIManual testing267268--13.01--
2021-06-10TJAOIManual testing268269--26.02--


ECM factoring results:
Total ECM effort:22.131 GHz-days
Estimated T-Level:24.383
DigitsB1CompleteFacMiss
20110009.4880.008%
25500000.87741.621%
302500000.05594.624%
3510000000.00399.742%


ECM Summary

B1B2factorcurvesGHz-days
500005000070.365
50000500000023120.44
50000530000070.635
50000645000070.694


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-11-07ANONYMOUSv4_computers72ABEDF11D7A3E8F0.155
1999-03-15ANONYMOUSv4_computers72ABEDF11D7A3E8F0.155
2018-04-30kkmrkkblmbrbkold72ABEDF11D7A3E8F0.155


PRP results:
No PRP results for M2297573


P-1 factor-bounds graph:
B1 = 9600000, B2 = 49498834770 (P-1 stage 2)
B1 = 1000000, B2 = 6014071140 (P-1 stage 2)
B1 = 1000000, B2 = 571651080 (P-1 stage 2)
B1 = 9600000 (P-1 stage 1)
B1 = 3000000, B2 = 90000000 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 1000000 (P-1 stage 1)
B1 = 405950, B2 = 4059500 (P-1 stage 2)
B1 = 405950 (P-1 stage 1)
B1 = 90000, B2 = 1755000 (P-1 stage 2)
B1 = 145872 (P-1 stage 1)
B1 = 117936 (P-1 stage 1)
B1 = 90000 (P-1 stage 1)
B1 = 75011 (P-1 stage 1)
B1 = 20000 (P-1 stage 1)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
269
268
267
266
265
264
263
262
261
260
258
this exponent TF target: 62
TF double-checked to: 67.9
ECM T-Level=24.38 ~= 64-bit
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Last modified: 2023-10-02T12:12:48+00:00