- #1
ooellis
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I was discussing something with my friends today. If you take the product of the first n primes and add 1 will this give you a prime number?
For instance:
2*3 +1 = 7 ------> prime
2*3*5 +1 = 31 -------> prime
2*3*5*7 + 1 = 2311 ------> prime
Can anybody find if/where this breaks down and why?
For instance:
2*3 +1 = 7 ------> prime
2*3*5 +1 = 31 -------> prime
2*3*5*7 + 1 = 2311 ------> prime
Can anybody find if/where this breaks down and why?