is 2 2822473 - 1
has 849650 decimal digits
takes 0.218 GHz-days to do one PRP test
Last-known PrimeNet details:
Assigned as ecm on 2022-08-04, 0.0% done, ETC 2022-08-04
0 primality tests remaining
ResidueStatus
L-LF3D687CCB51FB2E4double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26942.298668.1159%50000002000000001.74988.4873%44.048470.8220%2.7061%
PrimeNet2590.027262.7119%120002400000.00272.9313%0.029963.8049%1.0930%
GPU722630.565565.0794%160002600000.00331.8256%0.568765.7169%0.6375%
Difference+6+41.7332+3.0366%+4984000+199740000+1.7465+6.6617%+43.4797+5.1052%+2.0686%

Known prime factors:
No known factors for M2822473

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-11-28T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.196%
2016-09-18T02:20:28Jocelyn Larouchelow 4M12000033000006---0.033--2.552%
2016-09-21T12:09:18Jocelyn Larouchelow 4M1200003630000---0.035--2.607%
2016-09-22T12:02:46Jocelyn Larouchelow 4M1200003993000---0.037--2.662%
2017-03-03T01:10:46Jocelyn Larouchelow 4M30612430612406---0.051--2.926%
2018-02-20T11:48:58Jocelyn Larouchelow 4M403348403348---0.045--1.527%
2018-03-07T11:22:54Jocelyn Larouchelow 4M28224733061240---0.318--3.352%
2018-03-14T01:18:14Jocelyn Larouchelow 4M282247361224806---0.336--4.126%
2019-11-07T14:27:55masserManual testing30000003000000012---0.501--5.948%
2020-01-19T15:04:45masserManual testing500000020000000012---1.750--8.487%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-02-23T16:29:22Mark RoseManual testing21260--0.054--
2009-02-12T23:26:00Sturle Sundefoster.ifi260261--0.054--
2012-02-16T09:36:00Grant McCrackenthumper261262--0.109--
2013-01-10T10:21:00dbaughManual testing262263--0.348--
2015-04-21T09:19:00VictordeHollanderManual testing263264--0.696--
2015-04-21T09:19:00VictordeHollanderManual testing264265--1.324--
2016-02-13T14:46:54ramgeisManual testing265266--2.648--
2017-10-28T16:39:37Gordon SpenceManual testing266267--5.295--
2019-01-02T14:13:32chuenkitManual testing267268--10.59--
2021-05-13T10:54:12TJAOIManual testing268269--21.18--


ECM factoring results:
Total ECM effort:13.057 GHz-days
Estimated T-Level:22.193
DigitsB1CompleteFacMiss
20110004.7440.871%
25500000.43964.497%
302500000.02897.266%
3510000000.00199.870%


ECM Summary

B1B2factorcurvesGHz-days
500005000000939.70
50000665000070.835
500006735632141.680
50000675000070.841


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-05-09T00:00:00ANONYMOUSv4_computersF3D687CCB51FB2E40.218
2018-09-07T11:48:24kkmrkkblmbrbkoldF3D687CCB51FB2E40.218


PRP results:
No PRP results for M2822473


P-1 factor-bounds graph:
B1 = 5000000, B2 = 200000000 (P-1 stage 2)
B1 = 5000000 (P-1 stage 1)
B1 = 3000000, B2 = 30000000 (P-1 stage 2)
B1 = 2822473, B2 = 6122480 (P-1 stage 2)
B1 = 3000000 (P-1 stage 1)
B1 = 2822473, B2 = 3061240 (P-1 stage 2)
B1 = 2822473 (P-1 stage 1)
B1 = 306124, B2 = 3061240 (P-1 stage 2)
B1 = 403348 (P-1 stage 1)
B1 = 120000, B2 = 3993000 (P-1 stage 2)
B1 = 120000, B2 = 3630000 (P-1 stage 2)
B1 = 306124 (P-1 stage 1)
B1 = 120000, B2 = 3300000 (P-1 stage 2)
B1 = 120000 (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
TF factor-bounds graph:
269
268
267
266
265
264
263
262
261
260
250
260
270
280
290
2100
Last modified: 2022-09-28T03:37:02+00:00