Ndezvipi zvinotevera zvisiri rudzi rworudzi: nhamba kana kuti kunyange? Tichifunga nezvemubvunzo wapfuura, nyora mashoko akapoteredza mhinduro yacho. Inogona kuva mitsara 1 - 20. Mashoko akapoteredza:
Mukuwedzera kuRiemann hypothesis, dzimwe fungidziro dzakawanda dzinotenderedza nhamba dzokutanga dzakaratidzwa. Kazhinji kuva neshoko rokutanga, zvizhinji zvezvifungidziro izvi zvakaramba uchapupu kwemakumi emakore: zvinetso zvose zvina zvaLandau kubva muna 1912 zvichiri kusagadziriswa. Chimwe chazvo ipfungwa yaGoldbach, iyo inotaura kuti nhamba yose yakatwasuka n yakakura kupfuura 2 inogona kunyorwa sechiverengero chenhamba mbiri dzokutanga. Kubva munaFebruary 2011, fungidziro iyi yakasimbiswa kune nhamba dzose kusvika ku n = 2 · 1017. Mashoko asina kusimba kupfuura aya akaratidzwa, somuenzaniso theorem yaVinogradov inoti nhamba yose isina kuenzana yakakura zvakakwana inogona kunyorwa sechikamu chezvinhu zvitatu zvinokosha. Theorem yaChen inoti nhamba dzose dzakakura zvakakwana dzinogona kuratidzirwa sechiverengero chepamberi nehafu yepamberi, chibereko chepamberi mbiri. Uyewo, nhamba yose yakatwasuka inogona kunyorwa sechiverengero chenhamba huru nhanhatu. Bazi rorondedzero yenhamba rinodzidza mibvunzo yakadaro rinonzi rondedzero yenhamba yokuwedzera.