2,3,5,11,23,29,41,53,83,89,_

• solution :- All are prime number.
  so, this is series of prime number only..
  
  
• 9 years agoHelpfull: Yes(1) No(2)
• It is a famous series called as the SOPHIE GERMAIN PRIMES , the idea is that the prime number n will exist in the series if and only if the number 2n+1 is also prime.
  
  Ex-2 will exist because 2*2+1=5,which is prime
  
  Ex-3 will also exist because 3*2+1=7 which is also prime BUT,
  
  Ex- 7 will not exist because 7*2+1=15 ,which is not prime .
• 7 years agoHelpfull: Yes(0) No(0)