Sanin ma'anar farko
Babban lamba shine gaba ɗaya lamba mafi girma fiye da 1 tare da daidaitattun masu rarrabawa guda biyu: 1 da lambar kanta. Farko na farko sune 2, 3, 5, 7, 11 da 13. Lamba 1 ba firamare ba ne kuma ba ta ƙunshi abubuwa ba, kuma 2 shine kaɗai ma firamare.
Duba kawai har zuwa tushen murabba'in
Don gwada tabbataccen lamba n, ba kwa buƙatar gwada kowace lamba da ke ƙasa n. Idan n yana da ma'auni mafi girma fiye da tushen murabba'in sa, dole ne kuma ya sami madaidaicin ma'aunin da ya fi ƙanƙanta tushen murabba'in. Don haka gwada yiwuwar rarrabuwa har zuwa tushen murabba'in ya isa.
- Idan lambar ta kasance ƙasa da 2, ba ta fi girma ba.
- Bincika ko yana iya rarraba ta 2. Idan ya kasance ma kuma ya fi 2, ba shi da mahimmanci.
- Gwada rarrabuwa mara kyau daga 3 har zuwa tushen murabba'i. Idan wani ya raba daidai, lambar ta haɗe.
- Idan babu wanda ya raba daidai, lambar ita ce ta farko.
Misali: shine 97 na farko?
Tushen murabba'in 97 ya ɗan yi ƙasa da 10. Bincika masu rarrabuwar kawuna mai yuwuwa har zuwa wannan batu: 2, 3, 5 da 7. Ba a raba lambar ta kowane ɗayansu, don haka 97 shine mafi girma.
Domin 91, cak ɗin ya sami 7: 91 ÷ 7 = 13. Wannan ya isa ya nuna cewa 91 ya haɗa; babu buƙatar gwada manyan masu rarrabawa.
Kuskuren gama gari
- Kira 1 firamare. Babban dole ne ya sami daidaitattun masu rarraba guda biyu, yayin da 1 yana da ɗaya kawai.
- Tsammanin kowane lambar da ba ta dace ba ita ce babba. Ƙungiyoyin da ba su da kyau kamar 9, 15, 21 da 91 suna da masu rarraba mara kyau.
- Gwajin ƙananan ƙananan masu rarrabawa don adadi mai yawa. Dole ne cak ɗin ya rufe kowane mai yiwuwa mai rarrabawa har zuwa tushen murabba'i, ko amfani da ingantacciyar algorithm na asali.
UsefulVerse yana duba abubuwan shigar gabaki ɗaya na cikin gida a cikin burauzar ku. Babban sakamako shine binciken rarrabawa, ba hujja game da maɓalli na sirri ba ko madadin software na musamman na ka'idar lamba.