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 334,385 page views. His biography is available in 36 different languages on Wikipedia (up from 33 in 2019). Hippasus is the 224th most popular philosopher (down from 223rd in 2019), the 556th most popular biography from Italy (down from 550th in 2019) and the 19th most popular Italian Philosopher.

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

Memorability Metrics

  • 330k

    Page Views (PV)

  • 74.83

    Historical Popularity Index (HPI)

  • 36

    Languages Editions (L)

  • 8.56

    Effective Languages (L*)

  • 2.42

    Coefficient of Variation (CV)

Page views of Hippasuses by language


Among philosophers, Hippasus ranks 224 out of 1,089Before him are Hippias, Imre Lakatos, Gaston Bachelard, Diotima of Mantinea, Joseph de Maistre, and Paul Feyerabend. After him are Julia Kristeva, Slavoj Žižek, Franz Brentano, Chilon of Sparta, Celsus, and Epimenides.

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Among people born in 600 BC, Hippasus ranks 17Before him are Polycrates, Alexander I of Macedon, Lucius Junius Brutus, Maya, Pheidippides, and Mardonius. After him are Chilon of Sparta, Thespis, Hippias, Bias of Priene, Nahum, and Cleomenes I. Among people deceased in 500 BC, Hippasus ranks 7Before him are Esther, Myron, Ānanda, Polykleitos, Leucippus, and Artemisia I of Caria. After him are Gorgo, Queen of Sparta, Rāhula, Obadiah, Lars Porsena, Demaratus, and Polygnotus.

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In Italy

Among people born in Italy, Hippasus ranks 556 out of 4,088Before him are Pope John XVII (950), Matilda of Tuscany (1046), Pope Adrian III (800), Maria Theresa of Naples and Sicily (1772), Giulio Romano (1499), and Girolamo Frescobaldi (1583). After him are Denis (210), Giuseppe Piazzi (1746), Luca Signorelli (1450), Pope Miltiades (250), Conrad of Montferrat (1146), and Frank Capra (1897).


Among philosophers born in Italy, Hippasus ranks 19Before him are Tommaso Campanella (1568), Giambattista Vico (1668), Marsilio Ficino (1433), Cesare Beccaria (1738), Giorgio Agamben (1942), and Benedetto Croce (1866). After him are Julius Evola (1898), Marsilius of Padua (1275), Aristoxenus (-360), Alcmaeon of Croton (-510), Giovanni Gentile (1875), and Theano (-600).