Math, asked by ruatpuia34, 3 months ago

How many numbers in the form of 2^n -1, which are
less than 5000 are prime?

Answers

Answered by 349001669
1

Answer: 8179

The largest prime derived from a two-digit prime by inserting the sum of its digits in between.  The only prime less than a googol of form 2^n-n, where n is an emirp, (n=13).

Previous Question
Next Question
Similar questions
Science, 1 month ago
what is photosynthesis. . . . . . . . ? . . . .​
Math, 1 month ago
Twice the product of two increased by3...
English, 1 month ago
Story starting with a devastating shriek cut through the chaos of the afternoon picnic. The picnickers turned as one towards the lake from where the shriek has originated​...
Math, 3 months ago
which two numbers become 1500 when rounded to the nearest hundred...
Math, 3 months ago
The Volunteer Club raked leaves at several senior citizens homes in the neighborhood. If each group of three students could remove 7 cubic meters of leaves in one hour, find an integer to represent the number of cubic meters of leaves 12 students could remove in 5 hours.​(pls answer fast!!)) it's urgent!!
Math, 10 months ago
if MEANING is NFHADLN , WRITTEN is TMDIQVT then RELATED is ???​
Math, 10 months ago
Represent -2/5,-6/5,4/5 and 7/5 on number line.​
Math, 10 months ago
The speed of a boat in still water is 15 km/hr. It can go 30 km upstream and return downstream to the original point in 4 hours 30 minutes. Find the speed of the stream.