Error: u is not a valid modulus for a Dirichlet character. It should be a positive integer.
{'Lhash': '1731501608699953071199398476935', 'a10': [0, 0], 'a2': [0, 0], 'a3': [0.307410175886225, 0.5324500433986266], 'a4': [0, 0], 'a5': [2.4679891076950438, -1.4248941756847977], 'a6': [0, 0], 'a7': [0, 0], 'a8': [0, 0], 'a9': [1.3109979675232004, -2.270715088369716], 'accuracy': 100, 'algebraic': True, 'analytic_conductor': 20.34588243502225, 'analytic_normalization': {'__RealLiteral__': 0, 'data': '0.5', 'prec': 10}, 'bad_lfactors': [[2, [[1.0, 0], [0, 0]]], [7, [[1.0, 0], [0, 0]]], [13, [[1.0, 0], [3.013978485851613, 1.9788718217266164]]]], 'bad_primes': [2, 7, 13], 'central_character': '2548.1733', 'coefficient_field': 'CDF', 'conductor': 2548, 'conductor_radical': 182, 'conjugate': '1131287043213695217326189940227', 'degree': 2, 'euler_factors': [[[1.0, 0], [0, 0]], [[1.0, 0], [-0.307410175886225, -0.5324500433986266], [-1.5, 2.598076211353316]], [[1.0, 0], [-2.4679891076950438, 1.4248941756847977], [2.5, -4.330127018922194]], [[1.0, 0], [0, 0]], [[1.0, 0], 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'8.136367226815644278690794697181350', '9.193687680015572186208583361254891'], 'prelabel': '2-2548-91.4-c1-0', 'primitive': True, 'rational': False, 'root_analytic_conductor': 4.510641022628851, 'root_angle': 0.1221561760052112, 'root_number': '0.71962800815349736750838598326368224036506645009647193477 + 0.69435979857781939876648492523670227775932486398294728671*I', 'self_dual': False, 'sign_arg': {'__RealLiteral__': 0, 'data': '0.1221561760052112', 'prec': 60}, 'spectral_label': 'c1-0', 'types': ['CMF'], 'z1': {'__RealLiteral__': 0, 'data': '1.36591392643068314981597592279', 'prec': 103}, 'z2': {'__RealLiteral__': 0, 'data': '2.26146433957821405486614095161', 'prec': 103}, 'z3': {'__RealLiteral__': 0, 'data': '2.96976187059198606644422712407', 'prec': 103}}