Display the sum of consecutive primes between 1 and 100 million
If you like numbers, you'll like Sum of Primes. It's a cool little app that will display the sum of consecutive primes for integers greater than 1 up to 100,000,000.
For example, the number 41 can be written as 2 + 3 + 5 + 7 + 11 + 13.
However, there are some integers that cannot be expressed this way because their summands do not consist of consecutive primes. For example, 20 is expressed as 7 + 13 (missing 11) or 3 + 5 + 5 + 7 (duplicate 5).
Blog: http://tinyurl.com/sum-primes-blog