Zamkati
Chimodzi mwazinthu zomwe magulu amafufuza ndi zomwe gulu la Manambala akulu, amatanthauzidwa kuti amapangidwa ndi manambala omwe ali zogawanika zokha (zotsatira zake 1) ndi 1 (kudzipangitsa okha).
Mukamakamba za 'khalani ogawanika'Zikutanthauza izi Zotsatira zake ziyenera kukhala nambala yonse, chifukwa kuyankhula mosamalitsa, manambala onse amagawika pamitundu yonse (kupatula 0), ndikupereka zotsatira zochulukirapo kapena zochepa.
Kuchokera pamwambapa, tingapeze mfundo zina zofunika:
- Ngakhale manambala sangakhale oyamba, popeza manambala onse amatha kugawidwa, kuphatikiza awiri, ndi nambala inayake yomwe imadzetsa awiri. Kupatula pa izi ndi nambala yachiwiri yokha., chomwe ndichofunika kwambiri pokwaniritsa chofunikira chongogawika palokha komanso ndi gululi.
- Nambala zosamvetsekam'malo mwake, inde atha kukhala abale, mpaka pomwe sangathe kufotokozedwa ngati manambala ena awiri.
Zitsanzo za manambala oyamba
Ziwerengero zoyambirira makumi awiri zalembedwa pansipa ngati chitsanzo (zindikirani kuti nambala 1 siyikuphatikizidwa pamndandandawu, chifukwa sichikwaniritsa chiwerengero choyambirira).
| 2 | 31 |
| 3 | 37 |
| 5 | 41 |
| 7 | 43 |
| 11 | 47 |
| 13 | 53 |
| 17 | 59 |
| 19 | 61 |
| 23 | 67 |
| 29 | 71 |
Mapulogalamu A Prime Number
Pulogalamu ya Manambala akulu ndizofunikira kwambiri pamasamu ogwiritsa ntchito, makamaka pankhani yakugwiritsa ntchito kompyuta ndipo chitetezo chamtokoma pafupifupi.
Zimachitika kuti onse dongosolo kubisa Zimamangidwa pamaziko a manambala apamwamba, popeza mkhalidwe wakalewo umalepheretsa kuwola manambala; zomwe zikutanthauza kuti ndizovuta kwambiri kuzindikira kuphatikiza kwa manambala omwe mawu achinsinsi amabisika.
Kufalitsa kwa ziwerengero zazikulu
Kugwira ntchito ndi manambala apamwamba kuli ndi mawonekedwe ena omwe samapezeka masamu, zomwe zimapangitsa kukhala zosangalatsa kwa akatswiri ambiri masamu: mfundo yoti malongosoledwe ambiri samapitilira gulu la ndikuganiza.
Ngakhale manambala apamwamba awonetsedwa kuti alibe malire, palibe umboni weniweni wogawa mwa iwo pakati pa manambala onse: kutchulidwa kwakukulu kwa chiwerengero chachikulu cha theorem akunena kuti zikuluzikulu, zimachepetsa mwayi wokumana ndi chiwonetsero chachikulu, koma palibe kulongosola kwaumulungu komwe kumafotokoza mwachindunji momwe magawidwewa alili, kuti athe kuzindikira manambala onse oyamba.
Kuphatikiza pakati pa magwiridwe antchito a manambala oyamba ndi zophiphiritsa Pafupi nawo amapanga kusanthula kwawo kwakukonda masamu, ndikuti makompyuta adapangidwa kuti apeze manambala akuluakulu. Pakadali pano, nambala yaikulu kwambiri yodziwika ili ndi zoposa Manambala 17 miliyoni, chithunzi chomwe chitha kuwerengedwa kudzera pamakompyuta omwe amayankha pamavuto ovuta kwambiri.
