Got guts?

  • Thread starter anil
  • Start date
30
0
A prime number is a positive ineger greater than 2 whose only integer divisors are itself and 1. A Mersenne prime in of the form 2^(n) - 1 where p is a prime. For example 2^(5) - 1 = 31 is a Mersenne prime. One of the larger Mersenne prime is 2^(216091) - 1. Estimate the number of decimal digits in this number.

Please post your explanation and your answer. No this problem needs no calculus. Got guts[?]
 

jcsd

Science Advisor
Gold Member
2,085
11
Okay it's not my job to do your homework, so I will only give you a few pointers:

The -1 is unimortant to your estimate, so ignore that for the minute:

You can then construct this equation:

2^(216091) = 10^x

From here it should be very easy to solve.
 
30
0
Kiddo: this is not my HW

This is not my homework. LoL this is a "challenge problem" they give in my college to exercise brain. I got the answer I just wanna see my asnwer is right. 72030
 

jcsd

Science Advisor
Gold Member
2,085
11
No your answer is wrong, look at the equation I gave again, you may of made a simple error.
 

Related Threads for: Got guts?

  • Posted
Replies
6
Views
2K
  • Posted
Replies
5
Views
2K
  • Posted
Replies
2
Views
1K
Replies
21
Views
3K
Replies
21
Views
1K
  • Posted
Replies
3
Views
1K
Replies
61
Views
6K
Replies
3
Views
2K

Physics Forums Values

We Value Quality
• Topics based on mainstream science
• Proper English grammar and spelling
We Value Civility
• Positive and compassionate attitudes
• Patience while debating
We Value Productivity
• Disciplined to remain on-topic
• Recognition of own weaknesses
• Solo and co-op problem solving

Hot Threads

Top