Is 2001 a prime number?
146728
no, it is divisible by 1, 3, 23, 29, and itself (with the numbers being reduced as far as possible)
127181
3 5 7 11 13 17 19 23 29 31 37 41 43 47 53 59 61 67 71 73 79 83 89 97\n25 is NOT a PRIME NUMBER\n25/5=5
857498
In math, it means "can be divided" by numbers other than themselves (3 is divisible but only by 1 and itself). Prime numbers like 1, 3, 5, 7, 11, 13, 17, etc. are unique in that you can't divide them by another number to end up with another whole number. Non-prime numbers, like 4, 6, 8, 9, 10, 12, 14 and 16 are divisible because you can divide them by other numbers like 2, 3 or 4 and end up with another whole number (no decimals). Surely, some mathematician will explain this better and in more correct terms, but I did what I could on such short notice.
982295
A prime number is a positive integer such that the only integers which evenly divide it are 1 and itself.\n\nFor example, 7 is prime because only 1 and 7 divide it evenly.\n\nThe sequence of prime numbers begins thus:\n2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97 ...\nAnd there are infinitely many of them.\n\nhttp://en.wikipedia.org/wiki/Prime_number
795010
found in 2006, the largest known prime number contains 9808358 digits and it is \n\n2^32582656.\n\nplug in  _largest prime_  at yahoo search and pick a website.
522039
Primes from 50 to 100\n53\n59\n61\n67\n71\n73\n79\n83\n89\n97
772421
This answer will explain how to calculate is a number is a prime number. Short and sweet...\n\nStart by trying to divide the number by 2, then 3, then 5, etc(prime numbers) until the number you are dividing when squared is greater than the number you are dividing\n\nSo with 37 you start by dividing by 2(which doesn't go), then 3(which doesn't go), then 5 etc until 7 as 7^2 =49 which is greater than 37.\n\nUnlike in one post which said you divide up to 17, which is a waste of time.\n\nIn this case 37 is a prime number
387930
it is 2\ncoz it's the only even prime number
249626
A prime number is a natural number greater than 1 that can be divided evenly only by 1 and itself. The first few prime numbers are\n\n2, 3, 5, 7, 11, 13, 17, 19, 23, 29, ...
936530
Try to factorise number 319.\nIt is 11 * 29\nSo you have 11 rows 29 people per row \nor 29 rows with 11 people per row.\n\nIf you wonder how to find it it is simple\nTry to divide 319 with prime numbers\n\n2,3,5,7,11,13,17\n\nOnly 11 is ok!
886656
It can be as long as you want.\nChoose whatever positive integer n you want. Consider these numbers: n! + 2, n! + 3, .. , n! + n. They are n consecutive numbers. The first one is divisible by 2 (since n! = n*..*2*1, and 2 is), the second one is divisible by 3, .., the last is divisible by n. So none of those are prime.\nSo, whatever n you chose, you have n-1 consecutive non-primes. If I choose n = 1000001, theres a gap of at least 1000000 numbers between any primes there.
434001
i don't have the code but I guess you have to read something about 'numbers theory' and use the function 'mod'. once you understand the algorithm to generate prime numbers, write the code is gonna be easy.\nhope it helps
7923
There isn't one. Mathematicians are working on it, but they have yet to find a pattern that covers all prime numbers (except for the fact they are divisible only by themselves and one.) There are patterns that cover some prime numbers, such as paired primes (where the difference between the two prime numbers is 2, such as 5 and 7), but there is no currently known way to quickly produce or check primes, which has important implications for the RSA algorithm (used in PGP for example), which relies on the complexity of primes for its security.
735181
"Until the 19th century most mathematicians considered the number 1 a prime, and there is still a large body of mathematical work that is still valid despite labelling 1 a prime, such as the work of Stern and Zeisel. Henri Lebesgue is said to be the last professional mathematician to call 1 prime.\n\nThe change in label occurred so that each number has a unique factorization into primes."\n\nSee http://www.geocities.com/primefan/Prime1ProCon.html for more info. \n\n:)
749230
Neither.  A prime number has exactly two distinct factors, and 1 has only one.  And obviously it isn't composite.\n\nSome people will say 1 is prime, but they are wrong.
283106
7  14  21  35  49  77\n\nIt's 7 multiplied by primes between 1 and 11 (though 1 isn't officially a prime number)\n\n7*1\n7*2\n7*3\n7*5\n7*7\n7*11
231634
well i am trying to find out myself\n\n31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97.\n\nthat makes 15\n\n2, 3, 5, 7, 11, 13, 17, 19, 23, 29.\n\nthats 10\n\nU have all 25 prime less than 100 !\n\nAlways remember 1 is not a prime number ! cuz its divisible only by 1 and not any other number. and prime number requires divisibility by 1 and the number itself. i hope u got everything !\n\nmodified....i messed up somewhat. i wrote 65 and forgot 71. its clear now im sure watever i've writeen is 100% correct.