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600 BC - 500 BC

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Hippasus of Metapontum (; Greek: Ἵππασος ὁ Μεταποντῖνος, Híppasos; c. 530 – c. 450 BC) was a Greek philosopher and early follower of Pythagoras. Read more on Wikipedia

Since 2007, the English Wikipedia page of Hippasus has received more than 391,507 page views. His biography is available in 40 different languages on Wikipedia (up from 36 in 2019). Hippasus is the 184th most popular philosopher (up from 224th in 2019), the 424th most popular biography from Italy (up from 556th in 2019) and the 17th most popular Italian Philosopher.

Hippasus is most famous for his discovery of the irrationality of the square root of two.

Memorability Metrics

  • 390k

    Page Views (PV)

  • 69.44

    Historical Popularity Index (HPI)

  • 40

    Languages Editions (L)

  • 11.05

    Effective Languages (L*)

  • 2.36

    Coefficient of Variation (CV)

Page views of Hippasuses by language


Among philosophers, Hippasus ranks 184 out of 1,081Before him are José Ortega y Gasset, Pierre Gassendi, Max Horkheimer, Claude Adrien Helvétius, Emmanuel Levinas, and Posidonius. After him are Han Fei, Jakob Böhme, Muhammad Abduh, Sextus Empiricus, Athanasius Kircher, and Melissus of Samos.

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Among people born in 600 BC, Hippasus ranks 12Before him are Peisistratos, Servius Tullius, Ānanda, Belshazzar, Cambyses I, and Pheidippides. After him are Maya, Alexander I of Macedon, Yaśodharā, Polycrates, Mardonius, and Chilon of Sparta. Among people deceased in 500 BC, Hippasus ranks 7Before him are Esther, Myron, Leucippus, Ānanda, Polykleitos, and Artemisia I of Caria. After him are Rāhula, Diogenes of Apollonia, Gorgo, Queen of Sparta, Gaius Marcius Coriolanus, Obadiah, and Lars Porsena.

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In Italy

Among people born in Italy, Hippasus ranks 424 out of 4,668Before him are Dino Zoff (1942), Tinto Brass (1933), Philolaus (-470), Pope Marcellus I (255), Amadeo I of Spain (1845), and Clara Petacci (1912). After him are Pope Benedict III (810), Pope Sergius IV (970), Pope Marinus II (932), Pope Celestine IV (1200), Arturo Toscanini (1867), and Gaius Maecenas (-68).


Among philosophers born in Italy, Hippasus ranks 17Before him are Boethius (480), Tommaso Campanella (1568), Marsilio Ficino (1433), Giambattista Vico (1668), Bonaventure (1221), and Cesare Beccaria (1738). After him are Marsilius of Padua (1275), Benedetto Croce (1866), Giorgio Agamben (1942), Theano (-600), Alcmaeon of Croton (-510), and Julius Evola (1898).