Abstract
PurposeThis study aims to propose an extended (3 + 1)-dimensional integrable Kadomtsev-Petviashvili equation characterized by adding three new linear terms. Design/methodology/approachThis study formally uses Painleve test to confirm the integrability of the new system. FindingsThe Painleve analysis shows that the compatibility condition for integrability does not die away by adding three new linear terms with distinct coefficients. Research limitations/implicationsThis study uses the Hirota's bilinear method to explore multiple soliton solutions where phase shifts and phase variable are explored. Practical implicationsThis study also furnishes a class of lump solutions (LSs), which are rationally localized in all directions in space, using distinct values of the parameters via using the positive quadratic function method. Social implicationsThis study also shows the power of the simplified Hirota's method in handling integrable equations. Originality/valueThis paper introduces an original work with newly developed Painleve integrable model and shows new useful findings.