Keywords: Elliptic curve y^2=x^3-x on finite field Z 61.PNG graph en points of elliptic curve y<sup>2</sup> x<sup>3</sup>-x subset of Z<sub>61</sub><sup>2</sup> it punti della curva ellittica y<sup>2</sup> x<sup>3</sup>-x sottoinsieme di Z<sub>61</sub><sup>2</sup> own Technopop tattoo Elliptic curves |