Post Lots and Lots of Top-5000 Primes Here - Page 179

Happy5214 · 2021-02-11, 06:55

Quote:

Originally Posted by Trilo

55*2^2048305-1 is prime! (627441 digits)

That range was already tested by Kosmaj. Luckily I found it on PrimePages. It's 55*2^2084305-1.

kuratkull · 2021-03-06, 09:13

Code:

195*2^4685711-1 is prime! (1410542 decimal digits)

https://primes.utm.edu/primes/page.php?id=132121

k<300 highest Nash weight k delivers again.

pepi37 · 2021-03-06, 19:32

Quote:

Originally Posted by kuratkull

Code:

195*2^4685711-1 is prime! (1410542 decimal digits)

https://primes.utm.edu/primes/page.php?id=132121

k<300 highest Nash weight k delivers again.

Congratulations!

gd_barnes · 2021-03-18, 08:38

285*2^1801236-1 is prime

VBCurtis · 2021-04-05, 17:41

Been a while:
99*2^2658496-1 is prime! (800290 digits)

gd_barnes · 2021-04-12, 05:34

From the 3rd megabit drive:

257*2^2108554-1 is prime :-)

gd_barnes · 2021-04-26, 16:40

A pair from the 3rd megabit drive:

235*2^2163273-1
219*2^2178673-1

kuratkull · 2021-04-29, 20:22

Code:

197*2^4765318-1 is prime! (1434506 decimal digits)

https://primes.utm.edu/primes/page.php?id=132236

gd_barnes · 2021-06-27, 11:11

21*2^2959789-1 is prime

rudy235 · 2021-09-07, 18:27

The largest prime for 2021 and 2nd largest since Christmas 2018 has been discovered.

It is a 3 2 1 Prime i.e. 3*2^k-1 The prime is 3*2^17748034 -1 and has 5342692 digits.

This is the largest known prime for the 3*2^n-1 form.

Currently it stands in position 18 overall and is the 6^th Non-Mersenne prime in size.

Congratulations to Mark Wiseler and the PrimeGrid group.

slandrum · 2021-09-07, 21:48

Quote:

Originally Posted by rudy235

It is a 3 2 1 Prime i.e. 3*2^k+1 The prime is 3*2^17748034 -1 and has 5342692 digits.

So, is it +1 or -1?

Edit: I can see that it's almost certainly the -1 form from the next line in the post, but it's still confusing with the first line contradicting it.

VBCurtis: I fixed the post.

2021-03-06, 09:13	#1960
kuratkull Mar 2007 Estonia 149 Posts	Code: 195*2^4685711-1 is prime! (1410542 decimal digits) https://primes.utm.edu/primes/page.php?id=132121 k<300 highest Nash weight k delivers again.

2021-04-29, 20:22	#1966
kuratkull Mar 2007 Estonia 149 Posts	Code: 197*2^4765318-1 is prime! (1434506 decimal digits) https://primes.utm.edu/primes/page.php?id=132236

2021-09-07, 18:27	#1968
rudy235 Jun 2015 Vallejo, CA/. 3·383 Posts	The largest prime for 2021 and 2nd largest since Christmas 2018 has been discovered. It is a 3 2 1 Prime i.e. 32^k-1 The prime is 32^17748034 -1 and has 5342692 digits. *This is the largest known prime for the 32^n-1 form*. Currently it stands in position 18 overall and is the 6^th Non-Mersenne prime in size. Congratulations to Mark Wiseler and the PrimeGrid group. Last fiddled with by VBCurtis on 2021-09-08 at 00:01 Reason: Fixed the "+1" to be the correct -1*

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
MemTest x86 spewing lots of errors	Viliam Furik	Hardware	7	2020-09-27 22:27
Lots of roundoff errors	TheMawn	Software	18	2014-08-16 03:54
POST LOTS AND LOTS AND LOTS OF PRIMES HERE	lsoule	Riesel Prime Search	1999	2010-03-17 22:33
lots of large primes	Peter Hackman	Factoring	2	2008-08-15 14:26
How do I get computer to do lots of little tasks?	jasong	Information & Answers	4	2007-10-04 20:40

2021-03-18, 08:38	#1962
gd_barnes "Gary" May 2007 Overland Park, KS 2E21₁₆ Posts	285*2^1801236-1 is prime

2021-04-05, 17:41	#1963
VBCurtis "Curtis" Feb 2005 Riverside, CA 3·1,877 Posts	Been a while: 99*2^2658496-1 is prime! (800290 digits)

2021-04-12, 05:34	#1964
gd_barnes "Gary" May 2007 Overland Park, KS 7²·241 Posts	From the 3rd megabit drive: 257*2^2108554-1 is prime :-)

2021-04-26, 16:40	#1965
gd_barnes "Gary" May 2007 Overland Park, KS 7²×241 Posts	A pair from the 3rd megabit drive: 2352^2163273-1 2192^2178673-1

2021-06-27, 11:11	#1967
gd_barnes "Gary" May 2007 Overland Park, KS 7²·241 Posts	21*2^2959789-1 is prime