Count to a million (in prime numbers!)

actuallylike · 25-03-2009 01:10PM #1

Let's get nerdy people, same rules apply as the count to a million thread but in prime numbers only. In case you don't know, a prime number is divisible only by itself and 1 (ie 7 or 13, etc.).

There's plenty of prime number calclators on the web
example http://www.easycalculation.com/prime-number.php
if stuck but try it in your head first

I'll start by skipping 1 and 2 and onto

3

colrow · 25-03-2009 01:56PM

5

amy12 · 25-03-2009 01:57PM

7

colrow · 25-03-2009 01:59PM

11

25-03-2009 02:01PM

13

walshb · 25-03-2009 02:03PM

15

Ha!

colrow · 25-03-2009 02:09PM

walshb wrote: »

15

Ha!

Stupid Boy !!!!!!!!!!!!!!

17

Queen-Mise · 25-03-2009 02:30PM

19

Capt'n Midnight · 25-03-2009 02:37PM

23

Queen-Mise · 25-03-2009 02:54PM

29

triple-M · 25-03-2009 02:55PM

31

Queen-Mise · 25-03-2009 02:58PM

37

amy12 · 25-03-2009 03:02PM

39

poisonated · 25-03-2009 03:04PM

41

amy12 · 25-03-2009 03:14PM

43:cool:

Queen-Mise · 25-03-2009 03:17PM

47

39 isn't prime, it is divisible by 3

colrow · 25-03-2009 03:35PM

49

Queen-Mise · 25-03-2009 03:37PM

53

RangeR · 26-03-2009 04:12PM

59

Capt'n Midnight · 26-03-2009 05:43PM

Sixty-one is a cuban prime of the form p = (x3 − y3) / (x − y),x = y + 1.

Sixty-one is the largest know prime that divides the product of the next two primes plus 1.

Sixty-one is the sum of two squares
it is a centered square number,
a centered hexagonal number and
a centered decagonal number.

it is a Pillai prime.
It is also a Keith number,

colrow · 26-03-2009 05:49PM

67

Queen-Mise · 26-03-2009 10:52PM

71

I think, havent checked online

blindman · 26-03-2009 11:41PM

73

Richard · 26-03-2009 11:46PM

colrow wrote: »

49

49 isn't prime. It is 7x7.

Also, OP, 1 isn't prime either.

79 is, however.

magicianz · 26-03-2009 11:51PM

83!

blindman · 26-03-2009 11:51PM

81

magicianz · 26-03-2009 11:52PM

blindman wrote: »

81

81 is 9x9! Check and mate ;-)

drunkmonkey · 26-03-2009 11:53PM

(83,89) Sexy Primes if i'm not mistaken:)

Capt'n Midnight · 27-03-2009 01:45AM

magicianz wrote: »

83!

Factorial 83 is not prime.

97

http://primes.utm.edu/lists/small/millions/

Matt Holck · 27-03-2009 03:03AM

You asked me once, what was in Room 101. I told you that you knew the answer already. Everyone knows it. The thing that is in Room 101 is the worst thing in the world.

http://en.wikipedia.org/wiki/Room_101

Queen-Mise · 27-03-2009 10:52AM

101

Count to a million (in prime numbers!)

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