is 2 49408237 - 1
has 14873362 decimal digits
takes 90.513 GHz-days to do one PRP test
Last-known PrimeNet details:
0 L-L tests remaining
ResidueStatus
L-L4EC7DBC8CEC6B912double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual276309.745865.7895%575000152375003.64943.2184%313.395269.0078%6.6890%
PrimeNet2692.416362.3188%22000090000001.85515.1241%4.271467.4429%5.1241%
GPU7227338.715164.3836%320000100000002.25093.6771%40.966068.0607%3.6771%
Difference+3+271.0307+1.4059%+255000+5237500+1.3984-0.4588%+272.4292+0.9471%+0.9471%

Known prime factors:
No known factors for M49,408,237

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2010-01-28T13:25:00St.Mary'sUnivWISELABw257500015237500---3.649--3.218%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-11-28T00:00:00Team Prime Ribv4_computers?259--0.001--
2007-08-14T00:00:001997rj7v4_computers?263--0.020--
2008-06-03T14:50:00ANONYMOUSManual testing?264--0.040--
2008-07-25T00:00:00andreasbomkev4_computers264265--0.076--
2008-07-25T00:00:00andreasbomkev4_computers265266--0.151--
2008-07-25T00:00:00andreasbomkev4_computers266267--0.302--
2008-07-25T00:00:00andreasbomkev4_computers267268--0.605--
2008-07-25T00:00:00andreasbomkev4_computers268269--1.210--
2015-08-20T22:00:00Gordon SpenceManual testing269270--2.420--
2015-11-01T18:31:58Mark RoseManual testing270271--4.840--
2015-11-24T18:28:11monstManual testing271272--9.68--
2017-09-14T20:45:07Sid & AndyManual testing272273--19.36--
2019-09-13T21:34:13Jon PaceManual testing273274--38.72--
2020-12-21T10:32:15-Anonymous-Manual testing274275--77.44--
2020-12-23T15:22:54-Anonymous-Manual testing275276--154.9--


ECM factoring results:
Exponent "49408237" not found


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2010-03-30T05:32:00St.Mary'sUnivWISELABw24EC7DBC8CEC6B91290.51
2017-04-07T07:32:41ANONYMOUS4EC7DBC8CEC6B91290.51


PRP results:
Exponent "49408237" not found


P-1 factor-bounds graph:
B1 = 575000, B2 = 15237500 (stage 2)
B1 = 575000 (stage 1)
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104
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108
TF factor-bounds graph:
276
275
274
273
272
271
270
269
268
267
266
265
264
263
259
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260
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2100
Last modified: 2020-12-23T15:22:54+00:00