Leyland Primes (x^y+y^x primes) - Page 9

NorbSchneider · 2014-11-08, 13:52

I reached x=31,000 and found two new PRPs:
300^30247+30247^300, 74926 digits,
241^30280+30280^241, 72128 digits.

firejuggler · 2014-11-14, 17:45

range x=2500->3000 and y=12500->15000 done, 6 primes found

2696^14313+14313^2696 (already reported earlier)
2844^13855+13855^2844
2858^14763+14763^2858
2880^12617+12617^2880
2950^13563+13563^2950
2975^12664+12664^2975

Edit : those are PRP, not prime.

paulunderwood · 2014-11-14, 17:47

Quote:

Originally Posted by firejuggler

range x=2500->3000 and y=12500->15000 done, 6 primes found

2696^14313+14313^2696 (already reported earlier)
2844^13855+13855^2844
2858^14763+14763^2858
2880^12617+12617^2880
2950^13563+13563^2950
2975^12664+12664^2975

PRPs only?

firejuggler · 2014-11-14, 17:54

yes, my bad, PRP only.

Batalov · 2014-11-14, 17:55

Of course. None of us has access to CIDE, and even with CIDE the current record is 30,008 digit size.

XYYXF · 2014-11-14, 21:30

Quote:

Originally Posted by firejuggler

range x=2500->3000 and y=12500->15000 done, 6 primes found

Thanks a lot :-)

Now it would be nice to fill the gap 2000 < x <= 2500 for 12500 < y <= 15000 :-)

firejuggler · 2014-11-14, 23:32

I was pretty sure It was already reserved. If no one volonteer before I come back from my trip ( mid december) ten i'll do it.

XYYXF · 2014-12-02, 00:49

Quote:

Originally Posted by firejuggler

I was pretty sure It was already reserved. If no one volonteer before I come back from my trip ( mid december) ten i'll do it.

Thanks a lot. BTW, could you please specify your name to put it there?
http://xyyxf.at.tut.by/primes.html#0

XYYXF · 2014-12-02, 00:56

Quote:

Originally Posted by fivemack

I am running Y=18, should make it to 300k by the end of the month unless I've screwed up my calculations somewhere.

Meanwhile I got y=18 for 300k < x < 500k:
http://www.primefan.ru/stuff/primes/xyyx/18.txt

NorbSchneider · 2014-12-02, 06:04

I reached x=32,800 and found one new PRP:
329^32160+32160^329, 80954 digits.

I search now also in the for my reserved interval
40,001<=x<=50,000, 19<=y<=400 and found three new PRPs:
47^40182+40182^47, 67189 digits,
287^40210+40210^287, 98832 digits,
114^40495+40495^114, 83295 digits.

NorbSchneider · 2014-12-15, 05:09

I reached x=41,000 and found two new PRPs:
91^40746+40746^91, 79824 digits,
328^40945+40945^328, 103013 digits

2014-11-14, 17:45	#90
firejuggler Apr 2010 Over the rainbow 2³·5²·13 Posts	range x=2500->3000 and y=12500->15000 done, 6 primes found 2696^14313+14313^2696 (already reported earlier) 2844^13855+13855^2844 2858^14763+14763^2858 2880^12617+12617^2880 2950^13563+13563^2950 2975^12664+12664^2975 Edit : those are PRP, not prime. Last fiddled with by firejuggler on 2014-11-14 at 17:55

2014-11-14, 17:54	#92
firejuggler Apr 2010 Over the rainbow A28₁₆ Posts	yes, my bad, PRP only. Last fiddled with by firejuggler on 2014-11-14 at 17:54

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2014-11-08, 13:52	#89
NorbSchneider "Norbert" Jul 2014 Budapest 6D₁₆ Posts	I reached x=31,000 and found two new PRPs: 300^30247+30247^300, 74926 digits, 241^30280+30280^241, 72128 digits.

2014-11-14, 17:55	#93
Batalov "Serge" Mar 2008 Phi(4,2^7658614+1)/2 3⁶×13 Posts	Of course. None of us has access to CIDE, and even with CIDE the current record is 30,008 digit size.

2014-11-14, 23:32	#95
firejuggler Apr 2010 Over the rainbow 2600₁₀ Posts	I was pretty sure It was already reserved. If no one volonteer before I come back from my trip ( mid december) ten i'll do it.

2014-12-02, 06:04	#98
NorbSchneider "Norbert" Jul 2014 Budapest 109 Posts	I reached x=32,800 and found one new PRP: 329^32160+32160^329, 80954 digits. I search now also in the for my reserved interval 40,001<=x<=50,000, 19<=y<=400 and found three new PRPs: 47^40182+40182^47, 67189 digits, 287^40210+40210^287, 98832 digits, 114^40495+40495^114, 83295 digits.

2014-12-15, 05:09	#99
NorbSchneider "Norbert" Jul 2014 Budapest 109₁₀ Posts	I reached x=41,000 and found two new PRPs: 91^40746+40746^91, 79824 digits, 328^40945+40945^328, 103013 digits