mersenneforum.org  

Go Back   mersenneforum.org > Search Forums

Showing results 1 to 25 of 27
Search took 0.01 seconds.
Search: Posts Made By: spkarra
Forum: NeRDs 2015-02-14, 16:19
Replies: 15
Sticky: Primes found!
Views: 10,327
Posted By spkarra
Thumbs up Congrats, Batalov.

Congrats, Batalov.
Forum: Math 2015-01-23, 17:46
Replies: 21
Views: 3,786
Posted By spkarra
Almost 76.19% completed, ETA 20 more days.....

Almost 76.19% completed, ETA 20 more days.....
Forum: Math 2014-12-23, 13:25
Replies: 21
Views: 3,786
Posted By spkarra
Thanks Batalov. I will surely keep in mind to...

Thanks Batalov. I will surely keep in mind to test upto 74-bits before starting LL in future.
Forum: Math 2014-12-22, 00:02
Replies: 21
Views: 3,786
Posted By spkarra
Yeah, I started running LL test on the prime that...

Yeah, I started running LL test on the prime that I reserved...close to 40% completion and keeping fingers crossed..

---------------------------------------------------
Nov 15 18:07 Restarting...
Forum: Math 2014-11-14, 23:40
Replies: 21
Views: 3,786
Posted By spkarra
Thanks a lot Batalov. I completed P-1...

Thanks a lot Batalov.

I completed P-1 testing and got the results.txt. I updated in the GMIPS site, but unable to see in the list.

Anyhow, this is what I got in the results.txt:

[Fri Nov 14...
Forum: Math 2014-11-11, 12:57
Replies: 21
Views: 3,786
Posted By spkarra
Thumbs up Thanks a lot. I will get Prime95 installed on my...

Thanks a lot. I will get Prime95 installed on my computer and will try to reserve it. Will update the status soon....
Forum: Math 2014-11-08, 22:04
Replies: 21
Views: 3,786
Posted By spkarra
Thanks a lot Batalov. I tried for 93887011. ...

Thanks a lot Batalov.

I tried for 93887011.
--------------------
93887011 is a prime number!
----------------

Then I tried for 2^93887011-1 for primality.

I got this:
Forum: Math 2014-11-08, 22:02
Replies: 21
Views: 3,786
Posted By spkarra
Thanks a lot.

Thanks a lot.
Forum: Math 2014-11-08, 01:09
Replies: 21
Views: 3,786
Posted By spkarra
How do I test if it is a mersenne prime on GIMPS?

Hi,
I have a prime number (93886421). I cannot test if it is a Mersenne Prime or not on my computer. I want to submit as a manual assignment on GIMPS website.

I made sure that the above number...
Forum: No Prime Left Behind 2010-11-05, 19:44
Replies: 23
Views: 3,718
Posted By spkarra
I used BigInteger.IsProbablePrime(int...

I used BigInteger.IsProbablePrime(int certainity). To baseline my tests, I ran with the know Primes.

For Mersenne Prime 2^9941 - 1 (2993 digits long) the above Java Function took 2mins 47 secs....
Forum: No Prime Left Behind 2010-10-31, 16:15
Replies: 23
Views: 3,718
Posted By spkarra
Thanks Batalov. So, the additional ones that...

Thanks Batalov.

So, the additional ones that I had are:

5*3^5124 Minus 2 ; Length ; 2446
5*3^5750 Minus 2 ; Length ; 2745
5*3^7616 Minus 2 ; Length ; 3635


5*3^7702 Plus 2 ; ...
Forum: No Prime Left Behind 2010-10-30, 23:48
Replies: 23
Views: 3,718
Posted By spkarra
I uploaded the file that contains the results...

I uploaded the file that contains the results that I got from my Java code. I would be glad if it gets cross-checked.
Just export into MS-EXCEL 2003 or higher version - use ";" and "tab" as the...
Forum: No Prime Left Behind 2010-10-29, 23:38
Replies: 23
Views: 3,718
Posted By spkarra
Yes! I used JAVA's builtin fuction IsPrime. I...

Yes! I used JAVA's builtin fuction IsPrime. I will be glad to provide the BigIntegers, if you or anyone wants to cross-check.
Forum: No Prime Left Behind 2010-10-29, 00:05
Replies: 23
Views: 3,718
Posted By spkarra
List of 532 Prime Grid Numbers where n < 10,000

I found out that when n <10,000 the following n values belong to 532 Prime Grid.
*************************

5*3^1 Plus 2 ; Length ; 2
5*3^1 Minus 2 ; Length ; 2
5*3^2 Plus 2 ; Length ; 2
5*3^2...
Forum: No Prime Left Behind 2010-09-01, 12:44
Replies: 23
Views: 3,718
Posted By spkarra
Thanks a lot....Its becoming more challenging....

Thanks a lot....Its becoming more challenging....
Forum: No Prime Left Behind 2010-08-30, 14:32
Replies: 23
Views: 3,718
Posted By spkarra
532 Prime Grid

I started gathering Primes that fall under the 532 Prime Grid. viz.
5*(3^n) + OR - 2.
For example:
3^1=3; Mult with 5 = 15; Plus 2 = 17 (Length = 2) --- This is a Prime.

As of today, the last...
Forum: Math 2010-06-13, 20:38
Replies: 3
Views: 1,461
Posted By spkarra
Thanks for the response. Actually, I am looking...

Thanks for the response. Actually, I am looking for largest Harshad Number that is not divisible by 10 vix. 12, 18 etc.
Forum: Math 2010-06-12, 01:32
Replies: 817
Views: 42,116
Posted By spkarra
Tomer, Few months ago, I thought they were new...

Tomer,
Few months ago, I thought they were new and posted some of my conjectures.
In this forum, the members responded in a professional manner.

So, my advice is "Give a try", who knows what...
Forum: Math 2010-06-12, 01:29
Replies: 3
Views: 1,461
Posted By spkarra
Known Largest Harshad Number.

Hi,
I want to find as many Harshad Numbers as I can using JAVA on my 32-bit XP.
Before I start, I would like to know if anyone did the same. If so, what is the know largest Harshad Number (of...
Forum: Miscellaneous Math 2009-12-27, 01:26
Replies: 3
Views: 1,178
Posted By spkarra
Another series of prime numbers ?

Statement: Let p, q are two positive prime numbers, such that p! - 1 = q.

(Eg: p = 3; p! = 6; q = 6-1 = 5)


I found this statement is TRUE only when p = 3,5,7,379, .......

I haven't...
Forum: PrimeNet 2009-11-20, 00:56
Replies: 4
Views: 2,266
Posted By spkarra
Curious and want to share about Prime number 23

Hi,
While running a program for a diffferent reason, I found that prime number 23 has a peculiar character.

Statement: if p is a PRIME number and n is the Number of digits for Factorial(p),...
Forum: Math 2009-07-24, 12:52
Replies: 6
Views: 862
Posted By spkarra
Hi, After digit 2 , the next Mangammal prime is...

Hi,
After digit 2 , the next Mangammal prime is 541. Where can I find more information about Mangammal primes? I googled and I only got the links pertaining to the thread started by Devraj....
Forum: Miscellaneous Math 2009-07-24, 12:49
Replies: 6
Views: 1,026
Posted By spkarra
Is this phenomenon new?

Hi,
Here is my statement:
"If k is an positive number, p and q are Prime numbers and p^k NOT = q^k, such that integers of the form (p^k + q^k) will always be an even number ".

I tested...
Forum: Math 2009-07-20, 22:47
Replies: 8
Views: 1,147
Posted By spkarra
Thanks a lot .... In my conjecture, I mentioned...

Thanks a lot ....
In my conjecture, I mentioned that "the number of q’s are limited. ".
Now, I found that there are more than I found.....
Forum: Math 2009-07-17, 15:17
Replies: 8
Views: 1,147
Posted By spkarra
Peculiar behaviour of prime numbers .....

For the past three months, I am enthusiastically analyzing the known Mersenne’s Prime numbers and trying my best to look for some sort of commonality.

During this process, I found out a...
Showing results 1 to 25 of 27

 
All times are UTC. The time now is 17:11.


Sat Jan 22 17:11:33 UTC 2022 up 183 days, 11:40, 0 users, load averages: 2.02, 1.81, 1.59

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.

This forum has received and complied with 0 (zero) government requests for information.

Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation.
A copy of the license is included in the FAQ.

≠ ± ∓ ÷ × · − √ ‰ ⊗ ⊕ ⊖ ⊘ ⊙ ≤ ≥ ≦ ≧ ≨ ≩ ≺ ≻ ≼ ≽ ⊏ ⊐ ⊑ ⊒ ² ³ °
∠ ∟ ° ≅ ~ ‖ ⟂ ⫛
≡ ≜ ≈ ∝ ∞ ≪ ≫ ⌊⌋ ⌈⌉ ∘ ∏ ∐ ∑ ∧ ∨ ∩ ∪ ⨀ ⊕ ⊗ 𝖕 𝖖 𝖗 ⊲ ⊳
∅ ∖ ∁ ↦ ↣ ∩ ∪ ⊆ ⊂ ⊄ ⊊ ⊇ ⊃ ⊅ ⊋ ⊖ ∈ ∉ ∋ ∌ ℕ ℤ ℚ ℝ ℂ ℵ ℶ ℷ ℸ 𝓟
¬ ∨ ∧ ⊕ → ← ⇒ ⇐ ⇔ ∀ ∃ ∄ ∴ ∵ ⊤ ⊥ ⊢ ⊨ ⫤ ⊣ … ⋯ ⋮ ⋰ ⋱
∫ ∬ ∭ ∮ ∯ ∰ ∇ ∆ δ ∂ ℱ ℒ ℓ
𝛢𝛼 𝛣𝛽 𝛤𝛾 𝛥𝛿 𝛦𝜀𝜖 𝛧𝜁 𝛨𝜂 𝛩𝜃𝜗 𝛪𝜄 𝛫𝜅 𝛬𝜆 𝛭𝜇 𝛮𝜈 𝛯𝜉 𝛰𝜊 𝛱𝜋 𝛲𝜌 𝛴𝜎 𝛵𝜏 𝛶𝜐 𝛷𝜙𝜑 𝛸𝜒 𝛹𝜓 𝛺𝜔