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|---|---|---|---|---|
| Rank | Domain | PR | Backlinks | Pages in URL |
| 1 | primes.utm.edu | 6 | 13000 | 38600 |
| 3 | math.utah.edu | 6 | 24200 | 78500 |
| 4 | sciencenews.org | 7 | 208000 | 43600 |
| 6 | gadgets.boingboing.net | 7 | 408000 | 10300 |
| 7 | britannica.com | 9 | 1450000 | 1210000 |
| 8 | mersenne.org | 6 | 24700 | 178 |
| 10 | prime.isthe.com | - | 269 | 105 |
| 11 | news.bbc.co.uk | 9 | 15200000 | 3360000 |
| 13 | vnunet.com | 6 | 1070000 | 388000 |
| 14 | articles.latimes.com | 6 | 159000 | 1450000 |
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|---|---|---|---|---|
| Rank | Domain | PR | Backlinks | Pages in URL |
| 1 | sizes.com | - | ||
| 2 | cbc.ca | 8 | 1690000 | 2820000 |
| 3 | unc.edu | 8 | 1200000 | 1510000 |
| 4 | news.bbc.co.uk | 9 | 15200000 | 3360000 |
| 5 | itwire.com | 6 | 59900 | 87000 |
| 6 | signonsandiego.com | 4 | 748000 | 563000 |
| 7 | newscientist.com | 8 | 1330000 | 177000 |
| 8 | brainpop.com | 7 | 69400 | 4220 |
| 9 | lost.co.nz | 3 | 267 | 213 |
| 10 | trap17.com | 4 | 32900 | 239000 |
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||||
|---|---|---|---|---|
| Rank | Domain | PR | Backlinks | Pages in URL |
| 1 | primes.utm.edu | 6 | 13000 | 38600 |
| 2 | math.utah.edu | 6 | 24200 | 78500 |
| 3 | newscientist.com | 8 | 1330000 | 177000 |
| 4 | mathsisfun.com | 6 | 18200 | 7320 |
| 5 | sciencenews.org | 7 | 208000 | 43600 |
| 6 | brainpop.com | 7 | 69400 | 4220 |
| 7 | blogs.msdn.com | 7 | 2320000 | 561000 |
| 8 | unc.edu | 8 | 1200000 | 1510000 |
| 9 | prime.isthe.com | - | 269 | 105 |
| 10 | mersenne.org | 6 | 24700 | 178 |
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