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Perpetual Primes Production? (Posted on 2006-11-29) Difficulty: 3 of 5
Pick a positive integer to start a sequence. Now double it, and add one to the result: this is the second number of your sequence. Double that number, and add one, and that will be your third number; repeat the doubling and adding, and you will have a fourth number, and so on.

If you start with a prime number, and you keep doubling and adding one, is it possible to produce a sequence with only prime numbers?

See The Solution Submitted by Old Original Oskar!    
Rating: 4.0000 (2 votes)

Comments: ( You must be logged in to post comments.)
  Subject Author Date
details of a betDennis2006-11-30 09:41:36
re: A betCharlie2006-11-30 09:07:59
Some Thoughtsre: I would take that betFederico Kereki2006-11-29 21:50:30
re: I would take that betRichard2006-11-29 21:28:19
Hints/TipsI would take that betGamer2006-11-29 20:44:10
re: A betGamer2006-11-29 20:35:27
Some ThoughtsA betFederico Kereki2006-11-29 18:27:15
Some Thoughtsclassic proofNadia Modagon2006-11-29 18:20:28
re(3): One Approach (Spoiler?)Steve Herman2006-11-29 16:19:45
re(2): One Approach (Spoiler?)Richard2006-11-29 14:30:37
re: One Approach (Spoiler?)Bernie Hunt2006-11-29 13:41:48
One Approach (Spoiler?)Richard2006-11-29 12:17:45
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