The book is now available! 13
(just those submitted by Gupta)
Prime Curios!
Curios: Curios Search:
 

Participate:
Share

Just showing those entries submitted by 'Gupta': (Click here to show all)

Photo credit: Patrick Kik
+ The sum of primes up to 13 is equal to the 13th prime. [Gupta]

+ The smallest prime whose sum of digits is a square. [Gupta]

+ A concatenation of the first two triangular numbers. [Gupta]

+ The sum of first 13 prime numbers is 238 (whose sum of digits is 13). [Gupta]

+ The smallest prime that can be expressed as the sum of two primes (2 + 11) and two composites (4 + 9) in only one way. [Gupta]

+ pi(13) = 1! * 3!. [Gupta]

+ Currently (between the years 1901 and 2099) the Julian calendar is 13 days behind the Gregorian calendar. [Gupta]

(There are 2 curios for this number that have not yet been approved by an editor.)




Prime Curios! © 2000-2017 (all rights reserved)